That Tech training schools generosity explains TWO primo scopes. Since your last posting I thought [in order to have come up with those two units] that you had won the Lotto or made some dark alley findings in the manner of ”Aah,….. such a deal I have for you, already.”
I just mentioned that scopes auto-triggering mode to initially simplify matters, as typically I see first time operators having initial confrontations in just acquiring a trace on scopes or even finding it, if deflected/displaced off scale.
The coupling to the antenna via 1x probe at the scopes most sensitive vertical setting was on the hope that you might possibly see the ~1-3kc freq of serial burst data as very weak “snivets” on your scope trace. BTW , that TDS 340 dig scope is also a 100 meg b/w unit. It would take its big brother TDA380 at 400meg and more importantly its 2 gig sampling capability for scope analysis use at this freq. Therefore, as far as xmitter output signal ,and assuredly assuming that you have no 400-450 mhz scanner receiver, I now will suggest this:
You will need one common TV receiver that has cable band tuning capability. You place it in the cable band mode tuned to cable channel #56.A couple feet of ~20-22ga plastic insulated hook up wire with 1 bared end inserted within the TV’s antennas F-connector, into its center connection..
With no grounding being used, then interwrap the xmit antenna with that aforementioned insulated wires other end. Power up the whole remote xmitter unit and transmit a signal in the same manner as you would be using it in the future .Simultaneously observe the TV screen and sound for lines or herringbone interference in the raster, confirming a valid RF signal being sent out from your xmit module.
As far as receiver operationality one would only need to monitor its output pin mentioned before and if that signal generator that you mentioned covers 410-415 Mhz, have its output coupled in like manner mentioned above to the receiver antenna and a rocking of the tuning dial across the 418 mhz should produce a level shift output as is tuned past each time.<p>If you happen to go to the Hameg site referenced by Al, you might be able to polish up your knowledge on scope control’s cause and effects . Typically you wouldn’t have that much continual access time on the schools units. Looks like they give you 4 BNC sourced signal inputs to click and drag into your Ch 1 or 2 inputs and scale up and evaluate.
Initially confirm that your two (Ch 1 & 2)vert controls vernier adj's (red arrow at 9:00 pos) and also the hoz time base(red arrow at 9:00 pos) are at the cal position and then you should read:
Green BNC…..1 1/2V p/p sine signal @2200cycles
Brown BNC…..8V p/p.sine signal @4310~
Blue BNC…..4.4V p/p sine signal @1225~
Purple BNC…..3V p/p sine signal @1225~
Seems like the trainer has a shortcoming in the vert positioning control, it having only 20 digital steps, it needs many more to give enough vernier action for vert trace repositioning while taking vert amplitude measurements. It requires interpolation as it is.<p>73's de Edd
<p>[ June 11, 2004: Message edited by: Edd Whatley ]</p>