AOR AR5000 Manuál s instrukcemi stáhnout pdf (Strana 3)

The detector output can be taken from pin 9, IC8. This is a surface mount IC located on the

underside of the board (roughly under the 10.245Mhz crystal).

IC8 is labelled as MC3372M.

The output can be taken by directly soldering a wire to the output pin or from the capacitor it

feeds (C88 - located directly next to pin 9). Care must obviously be taken when carrying out

any work of this type. Note that there is a small DC level present on this pin and some DC

decoupling will be needed if none is present in the decoder input.

As all pins on ACC1 socket are used, the new detector output will now have to brought out of

the set separately or possibly connected to pin 4 on ACC2 if that socket is not being used.

Refit the board and test before re-fitting the top cover.

Approximate output levels to be expected directly from the IC are (with a large signal input

and 1kHz tone):

Filter used Deviated at 3kHz Maximum deviation for filter bandwidth

6kHz 900mV (p / p) 1.2V (p / p)

15kHz 600mV 1.2V

30kHz 300mV 1.2V

110kHz 200mV 1.2V

Further specification - measurements

The following additional specification has been generated at the request of customers, much

of the test data has been provided by AOR Japan and represents 'typical' measurements:

Maximum signal input:

+17dBm input is acceptable without damage over the entire frequency range of the AR5000,

this represents about 1.5V into 50 OHMS.

AGC time constant:

FM ON/OFF

AM, USB, LSB, CW OFF / SLOW

AFC (AR5000+3 only):

The AFC operates in AM, & FM modes, it is not operational in SSB modes. Operation

typically auto-tunes to centre frequency within a few seconds when an offset of a few kHz

exists. The maximum capture offset is 25kHz.

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AOR AR5000 Manuál s instrukcemi Strana 3