{"id":32614,"date":"2026-05-09T09:39:16","date_gmt":"2026-05-09T01:39:16","guid":{"rendered":"https:\/\/pxisource.com\/?post_type=product&#038;p=32614"},"modified":"2026-09-06T20:25:54","modified_gmt":"2026-09-06T12:25:54","slug":"pxi-2545","status":"publish","type":"product","link":"https:\/\/pxisource.com\/ru\/product\/pxi-2545\/","title":{"rendered":"PXI-2545"},"content":{"rendered":"<h3>PXI-2545 2.7 GHz Terminated RF Multiplexer<\/h3>\n<p>\u0417\u0435\u043c\u043b\u044f <strong>NI PXI-2545<\/strong> is a terminated 4\u00d71 PXI RF multiplexer switch module designed for automated routing of 50 \u03a9 signals from DC to 2.7 GHz. It connects one of four channel ports to a common RF port while routing inactive channels to internal 50 \u03a9 terminations.<\/p>\n<p>The terminated architecture helps prevent high-power reflections caused by open channels and provides a defined impedance for inactive RF paths. The module is suitable for receiver testing, source selection, communications validation and automated RF production systems.<\/p>\n<h3>Key Features of the PXI-2545<\/h3>\n<ul>\n<li>Terminated 4\u00d71 RF multiplexer topology<\/li>\n<li>DC to 2.7 GHz frequency range<\/li>\n<li>50 \u03a9 nominal characteristic impedance<\/li>\n<li>Four channel ports and one common port<\/li>\n<li>Five gold-plated SMA jacks<\/li>\n<li>30 V maximum switching voltage<\/li>\n<li>0.5 A switching and carry current<\/li>\n<li>10 W channel-to-common RF power<\/li>\n<li>1.5 W internal termination rating at 25\u00b0C<\/li>\n<li>Less than 2 dB insertion loss to 2.7 GHz<\/li>\n<li>Latching electromechanical relays<\/li>\n<li>Onboard relay-count tracking<\/li>\n<li>PXI trigger and NI-SWITCH support<\/li>\n<\/ul>\n<h3>PXI-2545 Technical Specifications<\/h3>\n<table>\n<tbody>\n<tr>\n<th>Product Model<\/th>\n<td>PXI-2545<\/td>\n<\/tr>\n<tr>\n<th>Part Number<\/th>\n<td>778572-45<\/td>\n<\/tr>\n<tr>\n<th>Product Type<\/th>\n<td>Terminated PXI RF Multiplexer<\/td>\n<\/tr>\n<tr>\n<th>Topology<\/th>\n<td>Terminated 4\u00d71 multiplexer<\/td>\n<\/tr>\n<tr>\n<th>\u0414\u0438\u0430\u043f\u0430\u0437\u043e\u043d \u0447\u0430\u0441\u0442\u043e\u0442<\/th>\n<td>DC to 2.7 GHz<\/td>\n<\/tr>\n<tr>\n<th>Characteristic Impedance<\/th>\n<td>50 \u03a9 nominal<\/td>\n<\/tr>\n<tr>\n<th>Maximum Switching Voltage<\/th>\n<td>30 V<\/td>\n<\/tr>\n<tr>\n<th>Maximum Switching Current<\/th>\n<td>0,5 \u0410 \u043d\u0430 \u043a\u0430\u043d\u0430\u043b<\/td>\n<\/tr>\n<tr>\n<th>Maximum Carry Current<\/th>\n<td>0,5 \u0410 \u043d\u0430 \u043a\u0430\u043d\u0430\u043b<\/td>\n<\/tr>\n<tr>\n<th>Maximum Channel-to-Common RF Power<\/th>\n<td>10 W<\/td>\n<\/tr>\n<tr>\n<th>Termination Power at 25\u00b0C<\/th>\n<td>1.5 W<\/td>\n<\/tr>\n<tr>\n<th>Insertion Loss to 1 GHz<\/th>\n<td>Less than 1 dB<\/td>\n<\/tr>\n<tr>\n<th>Insertion Loss to 2.7 GHz<\/th>\n<td>Less than 2 dB<\/td>\n<\/tr>\n<tr>\n<th>Typical Isolation to 1 GHz<\/th>\n<td>Greater than 60 dB<\/td>\n<\/tr>\n<tr>\n<th>Typical Isolation to 2.7 GHz<\/th>\n<td>Greater than 45 dB<\/td>\n<\/tr>\n<tr>\n<th>Typical Propagation Delay<\/th>\n<td>1.3 ns<\/td>\n<\/tr>\n<tr>\n<th>Typical Rise Time<\/th>\n<td>93 ps<\/td>\n<\/tr>\n<tr>\n<th>Maximum Relay Operate Time<\/th>\n<td>10.4 ms<\/td>\n<\/tr>\n<tr>\n<th>Listed Scan Rate<\/th>\n<td>45 cycles\/s<\/td>\n<\/tr>\n<tr>\n<th>\u0422\u0438\u043f \u0440\u0435\u043b\u0435<\/th>\n<td>Electromechanical, latching<\/td>\n<\/tr>\n<tr>\n<th>I\/O Connectors<\/th>\n<td>Five gold-plated SMA jacks<\/td>\n<\/tr>\n<tr>\n<th>Bus Connection<\/th>\n<td>PXI hybrid<\/td>\n<\/tr>\n<tr>\n<th>Module Format<\/th>\n<td>3U, one-slot PXI\/cPCI module<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Terminated 4\u00d71 Topology<\/h3>\n<p>One channel is connected to the common RF port while the inactive channels are connected to internal 50 \u03a9 terminations. This provides a defined load to inactive sources and reduces reflections compared with an open, unterminated path.<\/p>\n<p>The internal terminations cannot dissipate the full 10 W channel-to-common power. Each termination is rated for 1.5 W at 25\u00b0C and must be derated when ambient temperature rises above 25\u00b0C.<\/p>\n<h3>2.7 GHz RF Performance<\/h3>\n<p>The PXI-2545 is specified for signals through 2.7 GHz. Insertion loss is less than 1 dB to 1 GHz and less than 2 dB to 2.7 GHz.<\/p>\n<p>Typical isolation is greater than 60 dB through 1 GHz and greater than 45 dB through 2.7 GHz. Complete system performance also depends on cables, adapters, fixtures and connector condition.<\/p>\n<h3>10 W RF Signal Path<\/h3>\n<p>The selected channel-to-common path supports up to 10 W within the simultaneous voltage and current ratings. The internal termination power limit is much lower and must be considered separately.<\/p>\n<p>NI recommends against switching active RF signals. During relay actuation, a channel can be momentarily unterminated and expose the source to reflected power.<\/p>\n<h3>Latching Electromechanical Relays<\/h3>\n<p>Latching relays retain their selected state without continuous coil power. This reduces steady-state power consumption and heat compared with continuously energized relay coils.<\/p>\n<p>Electrical relay life depends on switched power, signal type and switching frequency. Relay-count information can help identify channels approaching their expected service life.<\/p>\n<h3>Typical PXI-2545 Applications<\/h3>\n<ul>\n<li>RF receiver input selection<\/li>\n<li>Multiple RF source routing<\/li>\n<li>\u0418\u0441\u043f\u044b\u0442\u0430\u043d\u0438\u0435 \u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u044f \u0441\u0432\u044f\u0437\u0438<\/li>\n<li>Antenna-path selection<\/li>\n<li>RF component characterization<\/li>\n<li>\u041c\u043d\u043e\u0433\u043e\u0446\u0435\u043b\u0435\u0432\u043e\u0435 \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0441\u0442\u0432\u0430 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432<\/li>\n<li>Automated spectrum-analyzer routing<\/li>\n<li>Signal-generator output distribution<\/li>\n<\/ul>\n<h3>NI-SWITCH Software Support<\/h3>\n<p>The PXI-2545 is controlled through NI-SWITCH. Software can select channels, disconnect all routes, create scan lists, configure PXI triggers and retrieve relay-count information.<\/p>\n<p>NI Switch Executive can define meaningful route names when the PXI-2545 is part of a larger RF switching system.<\/p>\n<h3>SMA Cable Selection<\/h3>\n<p>Use 50 \u03a9 SMA cables and adapters rated above the highest operating frequency and RF power. Cable insertion loss and return loss should be included in the test-system calibration.<\/p>\n<p>Avoid repeated overtightening or bending close to the connector because damaged SMA interfaces can increase insertion loss and VSWR.<\/p>\n<h3>PXI-2545 Troubleshooting<\/h3>\n<h4>The common port receives no signal<\/h4>\n<p>Verify that the correct channel is selected and inspect both SMA cables. Confirm that the signal source is connected to the intended channel rather than an inactive terminated path.<\/p>\n<h4>The source output power drops<\/h4>\n<p>Check whether the source is connected to an internal termination and whether termination power has been exceeded. Confirm the programmed switch state before enabling high RF power.<\/p>\n<h4>The module becomes unusually warm<\/h4>\n<p>Review internal termination power and ambient-temperature derating. Reduce RF power and allow the module to cool before continuing.<\/p>\n<h4>Insertion loss is higher than specified<\/h4>\n<p>Inspect and clean SMA connectors, replace questionable cables and verify that the measurement reference plane excludes external cable loss where appropriate.<\/p>\n<h4>The relay does not change state<\/h4>\n<p>Confirm NI-SWITCH communication and inspect the relay count. Test the route without applied RF power and determine whether the problem is inside the module or in the external path.<\/p>\n<h3>PXI-2545 vs PXI-2594<\/h3>\n<table>\n<tbody>\n<tr>\n<th>\u0424\u0443\u043d\u043a\u0446\u0438\u044f<\/th>\n<th>PXI-2545<\/th>\n<th><a href=\"https:\/\/pxisource.com\/ru\/product\/pxi-2594\/\">PXI-2594<\/a><\/th>\n<\/tr>\n<tr>\n<td>Topology<\/td>\n<td>Terminated 4\u00d71<\/td>\n<td>Unterminated 4\u00d71<\/td>\n<\/tr>\n<tr>\n<td>\u041c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u0430\u044f \u0447\u0430\u0441\u0442\u043e\u0442\u0430<\/td>\n<td>2.7 GHz<\/td>\n<td>2.5 GHz<\/td>\n<\/tr>\n<tr>\n<td>Internal Terminations<\/td>\n<td>\u0414\u0430<\/td>\n<td>No<\/td>\n<\/tr>\n<tr>\n<td>Maximum RF Path Power<\/td>\n<td>10 W<\/td>\n<td>10 W<\/td>\n<\/tr>\n<tr>\n<td>Best Suited For<\/td>\n<td>Applications requiring inactive-path termination<\/td>\n<td>Lower-loss unterminated routing<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Recommended Related Products<\/h3>\n<ul>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxi-2594\/\">PXI-2594 2.5 GHz RF Multiplexer<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxi-2595\/\">PXI-2595 5 GHz RF Multiplexer<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxi-2546\/\">PXI-2546 RF Multiplexer<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxi-2547\/\">PXI-2547 RF Multiplexer<\/a><\/li>\n<li><a href=\"https:\/\/pxisource.com\/ru\/product\/pxie-2593\/\">PXIe-2593 Configurable RF Multiplexer<\/a><\/li>\n<\/ul>\n<h3>Frequently Asked Questions<\/h3>\n<h4>What is the PXI-2545 part number?<\/h4>\n<p>The standard NI ordering part number is <strong>778572-45<\/strong>.<\/p>\n<h4>What is the topology?<\/h4>\n<p>The PXI-2545 is a terminated 4\u00d71 RF multiplexer.<\/p>\n<h4>What is the maximum frequency?<\/h4>\n<p>The module is specified for RF signals from DC to 2.7 GHz.<\/p>\n<h4>What is the internal termination rating?<\/h4>\n<p>Each internal termination is rated for 1.5 W at 25\u00b0C and must be derated at higher temperatures.<\/p>\n<h4>Can 10 W be applied to an internal termination?<\/h4>\n<p>No. The 10 W rating applies to the selected channel-to-common path, not the internal termination.<\/p>\n<h4>Does it use latching relays?<\/h4>\n<p>Yes. The PXI-2545 uses latching electromechanical relays.<\/p>\n<h4>Which connectors are used?<\/h4>\n<p>The module provides five gold-plated female SMA jacks.<\/p>\n<h3>Request a Quote for the PXI-2545<\/h3>\n<p>Contact us for current availability and project pricing for the <strong>PXI-2545 2.7 GHz Terminated RF Multiplexer<\/strong>. We can also help select compatible SMA cables and alternative RF switch modules.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u0428\u0438\u043d\u043d\u044b\u0439 \u0441\u043e\u0435\u0434\u0438\u043d\u0438\u0442\u0435\u043b\u044c: PXI Hybrid<br \/>\n\u041c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e\u0435 \u043a\u043e\u043c\u043c\u0443\u0442\u0438\u0440\u0443\u0435\u043c\u043e\u0435 \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u0435 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0433\u043e \u0442\u043e\u043a\u0430: 3 \u0412<br \/>\n\u0422\u0438\u043f \u0440\u0435\u043b\u0435: \u042d\u043b\u0435\u043a\u0442\u0440\u043e\u043c\u0435\u0445\u0430\u043d\u0438\u0447\u0435\u0441\u043a\u043e\u0435<br \/>\n\u041f\u0440\u043e\u043f\u0443\u0441\u043a\u043d\u0430\u044f \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u0441\u0442\u044c \u043a\u043e\u043c\u043c\u0443\u0442\u0430\u0442\u043e\u0440\u0430: 2,7 \u0413\u0413\u0446<br \/>\n\u0425\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0438\u043c\u043f\u0435\u0434\u0430\u043d\u0441: 5 \u041e\u043c<br \/>\nMax Insertion Loss: -2 dB<br \/>\nNumber of Channels: 4<br \/>\n\u041a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u0431\u0430\u043d\u043a\u043e\u0432: 1<br \/>\n\u041f\u0440\u0435\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u0435: \u0414\u0430<\/p>","protected":false},"featured_media":31183,"template":"","meta":{"_acf_changed":false},"product_brand":[18],"product_cat":[667],"product_tag":[],"class_list":["post-32614","product","type-product","status-publish","has-post-thumbnail","product_brand-national-instruments","product_cat-pxi-modules","first","instock","shipping-taxable","purchasable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ 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