Uniden Benjamin, Service Manual

Page: 28 / 77

15 S-Meter Sensitivity <Signal"9" >
(AM N0 MOD, SSB lKHz AF Output,
FM N0 MOD)
dBJJV
3 8 - 5 4 3 8 - 5 4 3 8 - 5 4
16 Clarifier Range dB Ł600 -±2.500 ±600~±2.500 ±600-±2.500
17 Hi Cut Effect
(66dB Input, 2KHz Standard)
dB - 3 MAX - 3 MAX
- 3 MAX
18
Local Oscillator Stop Voltage (AC) V 175 MAX
175 MAX 175 MAX
19 Current at No Signal (AC) mA
200 MAX
200 MAX 200 MAX
20
Current at AF max output (AC) mA 300 MAX
300 MAX
300 MAX
21
Sensitivity Deviation Between CH dB
3 MAX 3 MAX
3 MAX
22 Sensitivity Deviation Between USB
and LSB
dB
4
—
23 Adjacent Channel Rejection (fo
± 10 KHz)
dB
50 MIN 60 MIN
60 MIN
24
Frequency Tolérance Hz
within ±800
within ±800 within ±800
25
ANL/NB L
o s s
(6 dB Input)
dB
2 - 1 2 -
-
26
ANL + NB Performance (EIA Standard) dB
within 6 within 6
within 6
27
Image Rejection Ratio (fo ± 910 KHz)
dB 70 MIN
70 MIN
70 MIN
28
Ist IF Rejection Ratio (10.695 MHz)
dB 70 MIN
70 MIN
70 MIN
29
2nd IF Rejection Ratio (455 KHz)
dB
70 MIN
70 MIN
70 MIN
The squelch of this unit has hysterisis. Accordingly, squelch threshold measurement is
madę such that from the position when squelch started, it is returned immediately
before the squelch knob opens and it is okay if a sound is produced at 6dB (lpV)‘
or less.
Other Function Checks
a) At TX and RX, TX and RX LED's should light.
b) At TX, TX frequency should not change even if the clarifier is rotated.
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