Kenwood TK-260G, TK-270G service manual Bpf-Wave

TK-260G/270G

ADJUSTMENT

Item	Condition			Measurement		Adjustment		Specifications/
			Test equipment		Terminal	Parts	Method	Remark
1. Sensitivity	Adj item [SENS]		DVM			Encoder knob	fL : ([S.E N S]) : [88]
Adjustment	Adjust [∗∗∗]						fC : (S.E.N.S) : [134]
	fL	fc		fH			fH : (S.E.N.S. .) : [180]
	[S.E N S] ➞ [S.E.N.S] ➞ [S.E.N.S. .]
PTT : ON
2. BPF	(PANEL TEST MODE)		Tracking generator		ANT	L305, L306, L307	Adjust wave form
	CH-Sig 2-1		spectrum analyzer				to figure 1.(fL)
	Tra-G setting	-40dBm			BPF
	CH-Sig 1-1						Check wave form to figure 2.(fC)
	CH-Sig 3-1						Check wave form to figure 1.(fH)
			fL	fH		fC

			Fig. 1		Fig. 2
				BPF-WAVE
3. Sensitivity	[Panel Test Mode]		SSG	ANT
Check	1)	CH-Sig:1-1	AF VTVM			Check	12dB SINAD or
		SSG OUT	Oscilloscope				more
		Wide:-117dBm (0.3∝V)
		(MOD:1kHz / ±3kHz)
		Narrow:-117dBm (0.3∝V)
		(MOD:1kHz / ±1.5kHz)
4. Squelch (open)	1)	Adj item [SQL3]				Encoder	Adjust to the
Adjust		Adjust [∗∗∗]				knob	squelch
(Wide)		SSG OUT:				squelch.	threshold point
		-124dBm (0.14∝V)
	2)	Adj item [SQL3.]
(Narrow)		Adjust [∗∗∗]
		-124dBm (0.14∝V)
5. Squelch(Tight)	1)	Adj item [SQL9]					Adjust to the
Adjust		Adjust [∗∗∗]					squelch
[Wide]		SSG OUT:-117dBm (0.3∝V)					threshold point
[Narrow]	1)	Adj item [SQL9.]
		SSG OUT:-117dBm (0.3∝V)
6. Squelch	[Panel Test Mode]					Check	Squelch must
Check	1)	CH-Sig:1-1					be opened.
		SQ Level:[SQL5]
		SSG OUT:
		-118dBm (0.28∝V)
	2)	SSG OUT:OFF					Squelch must
							be closed.

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