----- Original Message -----
Sent: Sunday, July 05, 2009 8:54 PM
Subject: LF: Re: Re: Re: Mc Coy
Mal,
no problem, the info is indeed a bit limited
about the Hz/V for the adjustment.
The data sheet seems to suggest that the
control voltage is capable of modulating the oscillator, which implies
a fast slew rate. This is not particularly good if you intend to
just use the oscillator as a fixed frequency source. It means you must
filter the control voltage better.
Of course using the source at low frequencies,
none of the issues of this type of source will manifest themselves
significantly, but it is probable that the performance of a microwave local
oscillator locked to one of these may be a bit noisy.
To better understand the unit's
characteristics, measure the frequency at extremes of the control voltage
range. That is about all the information that is missing.
most oscillators of this type have a fairly
limited tuning range, so you may find pulling the unit to your desired
frequency on 500KHz is not possible. To reach 505 KHz the
oscillator must pull to 10.1MHz, which is a large excursion for oscillators of
this type 10 Hz in 10 MHz is 1ppm. 100KHz in 10 MHz is 10,000 PPM
Regards
mark
----- Original Message -----
Sent: Sunday, July 05, 2009 4:35
PM
Subject: LF: Re: Re: Mc Coy
Mark
Osc fired up and working fb. I was looking for
more detailed info about ctl voltages ie V versus Freq. This unit is
marked 10Mhz when supplied with 5V ctl voltage, and this is spot on with 6v
TTL output.
73 de mal/g3kev
----- Original Message -----
Sent: Saturday, July 04, 2009 1:37
PM
Subject: LF: Re: Mc Coy
30 sec search on the internet
----- Original Message -----
Sent: Saturday, July 04, 2009 12:42
PM
Subject: LF: Mc Coy
Hi all
Does anyone have data for Mc Coy
electronics XTAL OSCILLATOR MC137X7-001W 10.000 MHz
SN72758-126
This is a module and requires +5v, +15v
sealed unit but has an adjuster and I expect the osc can be shifted
slightly, but enough to be useful for 500 Khz divided down.
73 mal/g3kev
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