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V
Va
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Amplifier
2
2A
AM
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Se
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▪ Tel : 82-31-250-5011
Page 9/9
▪ All specifications may change without notice.
▪ rfsales@rfhic.com
▪ Version 1.2
※
There is no need for users to program the MCU chip on the control board.
You can easily evaluate the variable gain amplifier providing voltage to the evaluation board and toggling the switches on the control board.
PCB Evaluation Board
No
Description
1
2nd-Amp. Power supply
(Vd2=5v)
2
1st-Amp. Power supply
(Vd1=5v)
3,4,11
GND
5
Serial interface data input (Data)
6
Serial interface clock input
(Clock)
7
Latch Enable input (Latch)
8,9
Attenuator Power supply
& Control board supply
(Vd3=3v)
10
Serial mode select
(Vdc=3V)
Attenuation Control Board
No
Description
1
Serial interface port
Connect port A to port B
2
RS232
communication port
S/W downloading
(Only RFHIC use)
3
Attenuation control switch
Select 1 = 0.5dB
Select 2 = 1dB
Select 3 = 2dB
Select 4 = 4dB
Select 5 = 8dB
Select 6 = 16dB
①
②
③
③ ② ①
④ ⑤ ⑥ ⑦ ⑧
⑨ ⑩ ⑪
Control port A
Control port B
Connection
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