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The analyzer's drive level is a good bit lower than your radio's drive level. So long as you have set the zero-signal bias current, the analyzer's tiny signal should 'see' the same impedance as the radio's transmitter will be driving into.

The amplifier's input impedance will also be affected by the drive-power level. Biggest mismatch will occur when the drive level is at or over the 'clean' limit where distortion begins to kick in.

Just beware that an unstable amplifier can backfeed RF wattage into an analyzer and blow it out.

Been there, done that. Was a bad day.

73

[QUOTE="nomadradio, post: 792942, member: 22"] The analyzer's drive level is a good bit lower than your radio's drive level. So long as you have set the zero-signal bias current, the analyzer's tiny signal should 'see' the same impedance as the radio's transmitter will be driving into. The amplifier's input impedance will also be affected by the drive-power level. Biggest mismatch will occur when the drive level is at or over the 'clean' limit where distortion begins to kick in. Just beware that an unstable amplifier can backfeed RF wattage into an analyzer and blow it out. Been there, done that. Was a bad day. 73 [/QUOTE]

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