WRT-800A (AU)
Procedure
(1) Set the spectrum analyzer as below:
CENTER FREQUENCY (fc) : 799.250 MHz
REFERENCE LEVEL
: 20 dBm
FREQUENCY SPAN
: 200 kHz(20 kHz/DIV)
RBW (resolution band width) : 3 kHz
VBW (video band width)
: 1 kHz
ATT
: 20 dB
(2) Adjust
1
RV103/AU-258 board so that level between
carrier frequency (frequency center level) on spectrum
analyzer and tone signal is within 29 dB
±
1 dB.
2. Frequency check
Connections
(For connecting the DC power supply, refer to the “Prepa-
rations” on page 3-3.)
Switch and control setting
S301, S302, S303, S304/ RF-87 board (A-side)
WRT-800A
S301
S302
S303
S304
Channel
setting
AU66 model
_
0
1
OFF
67-01
Procedure
(1) Set the modulation analyzer as below:
MEASUREMENT
: FM
MEASUREMENT RANGE : 40 kHz
HPF
: 4 kHz
LPF
: >20 kHz
DE EMPHASIS
: OFF
(2) Check that the frequency counter (resolution : 0.1 Hz
setting) reading is 32.768 kHz
±
1 Hz.
3-9
RF adjusting connector
SMA-BNC
conversion connector
RF-87 Board
(B side)
AU-258 Board
(A side)
Modulation analyzer
Frequency counter
RF IN AF OUT
20 dBm
29 dB
±
1 dB
V : 10 dB/div
H : 20 kHz/div
fc
32.768 kHz
