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Good morning;
already tried everywhere, but is possible to find only the user manual, but no service manual, that is what I am looking for.
Have you anything?
Thank you for your help and patience
The instrument is second hand, from a local company, they said there are some small problems.......
I have good knwledge of this type of instruments, having a HP8569 and having had an Anritsu MS710.
The 30 MHZ reference is correct as frequency and level, the level is adjustable through the...
Good morning;
recently arrived a spectrum analyzer ADVANTEST R3132 not working, meaning that the trace is seen on the screen, but no signal is detected.
I have the user manual, but no schematic on it; anybody has the service manual or the schematics of this unit or similar ( I.E. R3131 ).
thank...
Use the FY6600 generator and connect the first source to the second generator, first square wave with 2 Hz period, 50 % duty cycle, and the second on/off modulated and carrierfrequency of 27 MHz
Good morning;
I have bought with aliexpress a signal generator as the link indicated below.
Powered, no sign of life.
Contacted the dealer, no answer, and aliexpress refused to press the dealer to help me.
From what I have seen and checked, seems to me that the firmware si corrupted or absent...
The fact is that under the loop frequency you must modulate the crystal of the reference frequency, otherwise the modulation will be acncelled by the loop correction, while above the loop frequency you can modulate directly the VCO.
The balance pot is used to avoid chenge in deviation passing...
It is hard to say without a schematic diagram.
In any case, the first picture seems to be a recovery diode, the diode that dissipates the energy accumulated into the lekage inductance of the trafo.
The other BYV52 diodes could be the rectifiers to allow the welding machine to work in DC mode on...
What you mean as -75: 75 Ohm impedance or - 75 dBm received field ?
Anyway, with 1 W and considering a 0 dB antenna gain (TX + RX ), you have:
30 meters = 65 dB attenuation, meaning a signal on the receiver of - 35 dBm
500 meters = 90 dB attenuation, meaning a signal on the receiver of - 60 dBm...
7. Place where the PCB is produced
8. Chemical processes on the connectors ( i.e. gold metalization )
9. Quality processes ( i.e. test on the nail beds )
10. Delivering (vacuum packed, single pcb packing, etc)
Mandi
If you add the schematic will be better.
Having this info, can be anything.
Control loop on open load ?
Reference voltage that follows the output voltage ?
Optocouplers not correctly polarized ( i.e too low current on the LED diode ) ?
It is very difficult to give the proper answer .
Mandi
The preamplifier is used to kill the noise figure of the first mixer and filter for noise image rejection, otherwise you will have a receiver with roughly 10 - 11 dB of noise figure, with preamplifier it will be reduced to 2-3 dB, as stated before.
About the link budget, you have 127 db of...
If you add a preamplifier in fron of the receiver, you will have three possible solutions
- LNA has a noise figure lower than the receiver : In this case you will increase the sensitivity of the receiver
- LNA has the same noise figure of the receiver : In this case you will decrease slightly...
Just measung phase between votage and current passing through.
If you see the meter only with the capacitors, you will see no power adsorbed, otherwise if you will add the light, you will see the meter increase the value.
Unfortunately, in electronics there ane no tricks to use.
Mandi
By their construction, the mains suppressors with a lightning current can have a maximum voltage of 1200 v across the terminals.
and thios is the same for all the companies.
personally I use the OBO V20C for household protection; no problem, sometimes you have to change the discharger because...
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