07-30-2014, 09:41 AM
Also from here:
http://www.antiqueradios.com/forums/view...0&start=20
I can say of the SG-165:
-AM RF Gen great 525-1625 Khz is - Great
-AM IF's Gen (455 & 262Khz +/- 25 KHz) - Great
-FM RF Gen 86-110 Mhz, weak, noise, no modulation or MPX sub-carrier - Limited/Fair
-FM IF (10.7 LC gen, 10.7 Mhz crystal) Great
-FM Sweep + 10.7 Mhz + 100 Khz comb markers - Excellent!
-FM MPX 19 Khz with 400 Khz modulation (L and R selectable
.......separately & modulation either 5% or 10%, MPX signal only not on RF - Limited/Good
.......w/ FM RF signal.. Good but limited
-FM 67 Khz SCA signal... Not sure nut wave form looks OK
-Speaker Meters - Dual audio power meters with selectable - Great
........impedance, good for stereo separation of AM alignment peak - Great
The two big limitations is the FM (85-110Mhz) signal is unmodulated and noisy. Also the FM signal does not carry the MPX pilot 19 Khz signal.... The MPX signal is a stand alone signal for direct injection into the multiplex decoder of the stereo receiver. That may be very useful.
From a scope session last night it does not produce MPX signal on-top of the 88-108 Mhz from what I see (could be wrong). From what I read in the manual the MPX or SCA signals are for direct injection into the Multiplex decoder.
Many radios call for the RF to be injected at the antenna with the sub-carriers. Of course there are workarounds. So can the SG-165 be used for stereo? Sure is can do something, but not all radios. Also if you want more precision something that cost more is needed. Has anyone used one for a stereo alignment? What radio and how did you use it.
-----------------------------
Also some pictures there, the signal looks sinewave though pics are low res and I wish they took at higher sweep frequency Mhz/div and better V/div
http://www.antiqueradios.com/forums/view...0&start=20
I can say of the SG-165:
-AM RF Gen great 525-1625 Khz is - Great
-AM IF's Gen (455 & 262Khz +/- 25 KHz) - Great
-FM RF Gen 86-110 Mhz, weak, noise, no modulation or MPX sub-carrier - Limited/Fair
-FM IF (10.7 LC gen, 10.7 Mhz crystal) Great
-FM Sweep + 10.7 Mhz + 100 Khz comb markers - Excellent!
-FM MPX 19 Khz with 400 Khz modulation (L and R selectable
.......separately & modulation either 5% or 10%, MPX signal only not on RF - Limited/Good
.......w/ FM RF signal.. Good but limited
-FM 67 Khz SCA signal... Not sure nut wave form looks OK
-Speaker Meters - Dual audio power meters with selectable - Great
........impedance, good for stereo separation of AM alignment peak - Great
The two big limitations is the FM (85-110Mhz) signal is unmodulated and noisy. Also the FM signal does not carry the MPX pilot 19 Khz signal.... The MPX signal is a stand alone signal for direct injection into the multiplex decoder of the stereo receiver. That may be very useful.
From a scope session last night it does not produce MPX signal on-top of the 88-108 Mhz from what I see (could be wrong). From what I read in the manual the MPX or SCA signals are for direct injection into the Multiplex decoder.
Many radios call for the RF to be injected at the antenna with the sub-carriers. Of course there are workarounds. So can the SG-165 be used for stereo? Sure is can do something, but not all radios. Also if you want more precision something that cost more is needed. Has anyone used one for a stereo alignment? What radio and how did you use it.
-----------------------------
Also some pictures there, the signal looks sinewave though pics are low res and I wish they took at higher sweep frequency Mhz/div and better V/div
