Motorola SSETM 5000 service manual TX RF-Page

Troubleshooting Charts: TX RF 9-25

9.14 TX RF—Page 1

No or low
TX power
Place XCVR and VOCON					Measure RF level
into the analysis fixture.					at PA output,
Key up. Measure RF					C103.
power at remote port
(fixture default).
					Level about	No	3
		Original		Check remote	+38 dBm?
TX	Yes		Yes
power OK?		power issue		port launch J102
		with remote		& radio assembly	Yes
		port?
No		No			Measure RF levels at
Use a spectrum analyzer					C722 & C723 (AC
		1			coupled). Calculate
and high-impedance RF					TX/RX switch loss.
probe. Measure TXRF
at FGU side of C106.
					Loss < 1 db?	No	Check/fix
							TX/RX switch
	No	Check
Frequency
OK?		FGU			Yes
Yes					Check/fix antenna/
					remote switch and
Level	No	Check			remote harmonic
					filter.
about
		FGU
+4 dBm?
Yes
Measure RF level
at driver amp
outlet, just after C107.
RF level at	No	2
approx. +26 dBm?
Yes
					MAEPF-27475-B
6881094C12-A							November 11, 2004