Differences

This shows you the differences between two versions of the page.

--- lock-in_amplifiers [2026/05/08 10:41] – [Remote access] simon
+++ lock-in_amplifiers [2026/05/08 11:36] (current) – [Remote access] simon
@@ Line 61: / Line 61: @@
   * SR865 Lockin Amplifier: Connection x
-===== SR 72xx =====
+===== EG&G 72xx =====
+The Signal Recovery 7260 and 7280 DSP Lock-in Amplifiers are high-performance digital lock-in amplifiers designed for precision AC signal recovery and phase-sensitive measurements in noisy laboratory environments. Both systems use advanced DSP technology to provide high sensitivity, low phase noise, flexible operating modes, and extensive automation capabilities for scientific and industrial measurements. The 7260 supports measurements up to 250 kHz, while the 7280 extends the operating range up to 2 MHz for wide-bandwidth applications.
+Key features include:
+  * Frequency range: up to 250 kHz (7260) and 2 MHz (7280)
+  * Voltage sensitivity: down to the nanovolt range
+  * Current sensitivity: down to the femtoampere range
+  * Dual-phase demodulation with simultaneous X/Y and R/θ outputs
+  * Dual reference and dual harmonic modes for simultaneous multi-frequency measurements
+  * Virtual reference mode for reference-free signal detection
+  * Integrated frequency and amplitude sweep generation
+  * Low phase noise and high dynamic reserve for stable measurements under noisy conditions
+  * Selectable digital filtering and programmable output time constants
+  * Integrated noise measurement and spectral display functions
+  * Auxiliary ADC/DAC channels and programmable digital I/O
+  * Internal curve storage and graphical visualization capabilities
+  * Remote control via RS232 and IEEE-488 (GPIB) interfaces
+There manuals can be found here:
+  * {{ :setup:lock_in:190163-a-mnl-d.pdf |7260}}
+  * {{ :setup:lock_in:190398-a-mnl-d_1_.pdf |7280}}
+==== Remote access ====
+Both the 7280 and 7260 allow for daysi chaining. The 7260 is daisychained to the 7280 and the 7280 uses a startech RS-232 to Land adapter with the following properties:
+  * Data Format on StarTech adapter: 9600-8N-1-N
+  * 7280 Settings: Baud Rate 9600; Data Bits 8+0 parity; Parity none, Adress 0; Echo Off; Prompt Off; Delimiter cr(ASCII 13)
+The 7260 uses the following properties
+  * Baud Rate 9600; Data Bits 8+ no parity; Delimiter cr(013); Adress 1; Echo Off; Parity odd; Prompt Off
+Use the following command to test communication with the 72xx:
+  * printf '\\N **0**\rID\r' | nc 192.168.100.19 4001
+it should reply:
+  * 7280
+The bold number represents the adress number given in the RS-232 communication setting.

Physik-Institut

Physik-Institut DAMIC Wiki

Differences

Physik-Institut

Physik-Institut DAMIC Wiki

User Tools

Site Tools

Differences

Page Tools