Kenwood KCH-16, Service Manual

Page: 54 / 85

KCH-16
54
ADJUSTMENT
Item Condition
Measurement Adjustment
Specifi cations / Remarks
Test-
equipment
Unit Terminal Unit Parts Method
• Narrow 3) Adj item: [N SQON]
Adjust: [***]
SSG output
: 12dB SINAD level –3dB
(MOD: 1kHz/±1.5kHz) SSG
AF VTVM
Oscillo-
scope Rear
panel ANT
EXT.SP Front
panel [Orange] After input signal
from SSG, press
[Orange] key.
That numeric will be
stored in memory.
After adjusting SQL, check
SQL open/Close.
[Panel test mode]
1) CH-Sig: 1-1
SSG 12dB SINAD or less
: Open
SSG –130dBm (0.07µV)
: Close
2) CH-Sig: 2-1
SSG 12dB SINAD or less
: Open
SSG –130dBm (0.07µV)
: Close
3) CH-Sig: 2-1
SSG 12dB SINAD or less
: Open
SSG –130dBm (0.07µV)
: Close
8. Squelch
(Tight) adjust
• Wide 1) Adj item: [W SQTW]
Adjust: [***]
2) Adj item: [WL SQTW]
→
[WC SQTW] → [WH SQTW]
Adjust: [***]
SSG output
: 12dB SINAD level +5dB
(MOD: 1kHz/±3kHz)
After adjusting SQL, check
SQL open/close.
[Panel test mode]
1) CH-Sig: 1-1
SSG 16dB SINAD or more
: Open
SSG 12dB SINAND level –4dB
: Close
2) CH-Sig: 2-1
SSG 16dB SINAD or more
: Open
SSG 12dB SINAD level –4dB
: Close
3) CH-Sig: 3-1
SSG 16dB SINAD or more
: Open
SSG 12dB SINAD level –4dB
: Close
• Narrow 3) Adj item: [N SQTN]
Adjust: [***]
SSG output
: 12dB SINAD level +6.5dB
(MOD: 1kHz/±1.5kHz) After adjusting SQL, check
SQL open/close.
[Panel test mode]
1) CH-Sig: 1-1
SSG 16dB SINAD or more
: Open
SSG 12dB SINAND level –4dB
: Close
2) CH-Sig: 2-1
SSG 16dB SINAD or more
: Open
SSG 12dB SINAD level –4dB
: Close
3) CH-Sig: 3-1
SSG 16dB SINAD or more
: Open
SSG 12dB SINAD level –4dB
: Close
9. BER (Bit
Error Rate)
check [Panel test mode]
1) CH-sig: 1-20
SSG output
: –117dBm (0.32µV)
(C4FM)
(1011Hz Tone Test Pattern)
Digital ra-
dio tester Check 5% or less