And the signal generator output is accurate?
Get someone with a more current and calibrated unit to verify.
Seems to me you are using an R1200 service monitor that is 50+
years old?
73, Jim W7RY
On 11/2/2022 11:53 AM, Mike Besemer -
WM4B wrote:
Are we sure the receiver (and/or the service monitor) is
on-frequency?
Mike
WM4B
On November 2, 2022 at 12:47 PM "Bob
Dengler via groups.io" <no6b@...>
wrote:
At 11/2/2022 09:35 AM, you wrote:
>Spec for the MTR2000 VHF is 0.35 uv or -116 dbm at 12db
SINAD, so his receiver is pretty close.
1 dB less than that is typically what I get out of a MASTR II or
MVP, which has the same spec. However, at least here in SoCal
that's pretty much equal to the noise floor on 2 meters.
Depending on the site I may or may not try adding a preamp; in
most cases no because the actual S/N improvement is
insignificant. However at 0.4 uV that's 2 dB worse, which in
most cases would clearly be throwing away S/N. So I wouldn't be
happy with 0.4 uV either - worth getting that 1 dB or
(hopefully) more back.
Bob NO6B
--
Thanks and 73, Jim W7RY
