Function:

Provide for muting of receiver during keying; optionally provides AGC for receivers with IF AGC (and preferrrably for direct conversion receivers)

Input/Output:

• POWER: 9-15 VDC, 5.5 x 2.5mm power jack
• AF IN: Zin = 10K, Zsource expect 200 ohms, RCA Jack
• AF OUT: Zout <= 200 ohms, Zload = 2K, RCA Jack
• KEY IN: Zin >=10K, driven by CMOS; RCA Jack
• AGC IN (Optional): Zin >= 10K, 0-2.5V, where 0V = max throughput, 2.5V = max attenuation

Operator Controls:

• No operator controls anticipated

Key Specs or Limitations:

• Voltage Gain: -3 to 0db (with AGC = 0V)
  Voltage Gain: -20 dB (i.e., minimum loss, more loss is prefrrable) (with AGC = 2.5V)
• Output AC coupled

Misc Notes: