UHF MSF5000 tuning?
Moderator: Queue Moderator
UHF MSF5000 tuning?
Working on a UHF MSF5000, bringing it from 464MHz down to 447MHz. Curious, are the tuning procedures on CLB and RLB units the same, or is it different? Unfortunately all I have is a CLB manual... Thanks! Any pointers?
yep
if you are talking about the pre/post filtering alignment, the preselector alignment and imaging filter aligments... yes they are all the exact same as the analog.
doug
doug
BRAVO MIKE JULIET ALPHA
"You can do whatever you want, there are just consequences..."
IF SOMEONE PM'S YOU - HAVE THE COURTESY TO REPLY.
"You can do whatever you want, there are just consequences..."
IF SOMEONE PM'S YOU - HAVE THE COURTESY TO REPLY.
hmm
yep, just program it first and don't forget to peak the VCO's using the procedure that's located in the setup chapter (38ua peak on meter 3 i think....)
d
d
BRAVO MIKE JULIET ALPHA
"You can do whatever you want, there are just consequences..."
IF SOMEONE PM'S YOU - HAVE THE COURTESY TO REPLY.
"You can do whatever you want, there are just consequences..."
IF SOMEONE PM'S YOU - HAVE THE COURTESY TO REPLY.
Excellent - Much appreciated. Though I do have another question and I'm going to start it on another thread as well to make it more visible:
I have an RLB series MSF-Limited. UHF. Has the TTRC and SSCB boards, obviously. Can this unit support DC signalling? I'm looking to interface a Motorola SpectraTAC Voting Comparator to it, and the comparator is currently equipped with a DC Keying module. I see references to DC options in the RSS, but am wondering: Is a separate module or daughter card required for DC operation, or is everything already in there? The complete model number is C64RLB7106BT.
SpectraTAC parts are hard enough to find as it is, so I'l like to stay with DC until I can find a Tone Keying Module for the SpectraTAC Comparator.
Any information is appreciated
I have an RLB series MSF-Limited. UHF. Has the TTRC and SSCB boards, obviously. Can this unit support DC signalling? I'm looking to interface a Motorola SpectraTAC Voting Comparator to it, and the comparator is currently equipped with a DC Keying module. I see references to DC options in the RSS, but am wondering: Is a separate module or daughter card required for DC operation, or is everything already in there? The complete model number is C64RLB7106BT.
SpectraTAC parts are hard enough to find as it is, so I'l like to stay with DC until I can find a Tone Keying Module for the SpectraTAC Comparator.
Any information is appreciated
Re: hmm
Also, follow the instructions for the duplexer - dips with the probe, etc. If you don't, you'll be amazed at the horrible results.batdude wrote:yep, just program it first and don't forget to peak the VCO's using the procedure that's located in the setup chapter (38ua peak on meter 3 i think....)
d
pre/post filtering
when tuning the pre/post filter... intead of using "peaks and dips" on your spectrum analyzer (the usual method)
if you are using a R2001 series moinitor.... switch to the main "monitor" menu (top selection of the mode series lights) and use the RF MILLIVOLTMETER function.
TENTHS of a millivolt greatly affect your transmit power level... and using a RF millivoltmeter greatly improves the accuracy of your adjustments.
of course, if you're used to tuning analog msf's.. this is probably old news.
as for your DC spectra-tac questions... outta my league.. but i was under the impression that the TTRC could handle both tone and DC.... could be wrong there tho
doug
if you are using a R2001 series moinitor.... switch to the main "monitor" menu (top selection of the mode series lights) and use the RF MILLIVOLTMETER function.
TENTHS of a millivolt greatly affect your transmit power level... and using a RF millivoltmeter greatly improves the accuracy of your adjustments.
of course, if you're used to tuning analog msf's.. this is probably old news.
as for your DC spectra-tac questions... outta my league.. but i was under the impression that the TTRC could handle both tone and DC.... could be wrong there tho
doug
BRAVO MIKE JULIET ALPHA
"You can do whatever you want, there are just consequences..."
IF SOMEONE PM'S YOU - HAVE THE COURTESY TO REPLY.
"You can do whatever you want, there are just consequences..."
IF SOMEONE PM'S YOU - HAVE THE COURTESY TO REPLY.
I have the same radio: C64RLB7106B. You really should purchase the Installation manual and Service manual (such that it is), as these indicate the various jumper settings you need for tone or DC control. The radio will do either one. I found that some of the jumper positions in my unit made no sense at all, so a few must be ignored depending on the setting of the others.
This was my first, and so far, only MSF5000, but I'm scheduled to get a C74CXB7106BT one of these days, which is basically the same as the RLB. Never saw an analog unit, but I'd think that the tuning procedure is exactly the same, as it doesn't make use of the controller at all. As people have recommended, use the real tuning probe for the duplexer (my CXB has one, I used an external Celwave 6-cavity duplexer on my RLB).
Bob M.
This was my first, and so far, only MSF5000, but I'm scheduled to get a C74CXB7106BT one of these days, which is basically the same as the RLB. Never saw an analog unit, but I'd think that the tuning procedure is exactly the same, as it doesn't make use of the controller at all. As people have recommended, use the real tuning probe for the duplexer (my CXB has one, I used an external Celwave 6-cavity duplexer on my RLB).
Bob M.