Rohde & Schwarz 890 Series - A1.6 Setting the AF Output Level; A1.6.1; A1.6.2; Procedure

V L F > H F R E C E I V E R S f R & S E K 8 9 5 / R & S E K 8 9 6
User Manual f Setting the AF Output Level
A1.6 Setting the AF Output Level
A1.6.1 Required Test Equipment
f Voltmeter URE 342.1214.02
f Signal Generator SMK 348.0010.03
A1.6.2 Procedure
1. Switch off the VLF>HF receiver.
2. Disconnect RF cable from antenna socket
(see Fig. A1.1).
3. Disconnect AF line from female connector
strip OUTPUT.
4. Connect signal generator to antenna
socket.
5. Switch on signal generator.
6. On signal generator set a frequency of
5.001 MHz and a level of 1!mV
EMF
.
7. Switch on VLF>HF receiver.
8. On VLF>HF receiver set a frequency of
5.000!MHz and modulation mode USB.
9. By means of voltmeter measure level via
600 ‡ at contacts X66.1 (AFa) and X66.2
(AFb).
Nominal value: 0 dBm
Adjust output level to 0 dBm by means of
variable resistor LINE (>10 to +10 dBm), as
necessary.
10. Perform steps 1 to 7 in the reverse order.
Fig. A1.1 Location of Variable Resistor LINE and Test Setup
Signal
Generator
Volt>
meter
6164.0717.02_01
> A1.7 >