HP 53131A - Khz to 100 Mhz Sensitivity for HP 53181 A

Chapter 1 Performance Tests
Test 2: Channel 1 Frequency Sensitivity (HP 53181A Only)
1-52 Assembly-Level Service Guide
1
100 kHz to 100 MHz Sensitivity for HP 53181A
1 Connect the equipment as shown in Figure 1-12 with the signal
generator connected to Channel 1 of the Counter.
Figure 1-12. Channels 1 Frequency Sensitivity Test Setup
2 Set the HP 8663A Signal Generator to output a 100 kHz,
−
35.0 dBm
sine wave signal (
−
20.0 dBm for Option 060) to the Counter’s
Channel 1 input.
3 In 0.1 dB steps, increase the power level until the Counter
displays a stable reading of 100 kHz.
The Counter should display 100 kHz when the signal generator level
is
≤ −
21.0 dBm (20 mVrms). Counters with Option 060 Rear Terminals
should display 100 kHz when the signal generator level is
≤ −
9.5 dBm
(75 mVrms).
HP 53181A
Counter
HP 8663A
Synthesized Signal Generator
N-to-BNC
Connector
Output
Channel 1
50Ω
Feedthrough
Ref. In
(rear panel)
Input
(rear panel)
BNC Tee