1674C and 1678C Automatic Microphone Mixers

1674C & 1678C INPUT SPECIFICATIONS
ACTUAL FOR USE SENSITIVITY VOLTAGE INPUT LEVEL
INPUT CNN LOAD WfT1-1 AT MAX On dB re: 0.775 vohs) CONNECTOR
CONNECTION SWITCH IMPEDANCE NOMINAL GAIN NOMINAL MAX BEFORE CLIP IN MIXER
500 to
CHANNEL -74 1.5kf1 6000 -90 dB (0.0245 mV) -74 dB (0.155 mV) -40 dB (7.75 mV) 3-pin
INPUT -60 1.5kf) mics & -76 dB (0.123 mV) -60 dB (0.775 mV) -26 dB (38.8 mV) XLR type
(1 to 8) Line' 1.SkQ lines -26 dB (38.8) mV + 4 dB (1.23V) +24 dB (12.3V) female connector
LINK 10kC2
INPUT 10KO Link -26 d8 (38.8 mV) -20 d8 (77.5 mV) +24 dB (12.3V) 5-pin, XLR type (MIX & Output female connector PREMIX)

Push Button Tip-priority Contact closure inch 3-circuit
MUTE & 50kQ or toggle Ring-Mute 0 vdc to ground (stereo) phone
PRIORITY connected to switch Sleeve-Ground activates jack (T.R.S.)
CONTRO; +15 ~dc contact~ function

'LINE level input sensitivity (-26 dB) is selectable only on Channels 4 and 8 with internal MIC/LINE level switch. 1674C & 1678C OUTPUT SPECIFICATIONS
ACTUAL FOR USE VOLTAGE OUTPUT LEVEL
OUTPUT SOURCE WITH Qn dB re: 0.775 volts) CONNECTOR
CONNECTION IMPEDANCE NOMINAL NOMINAL MAX BEFORE CLIP IN MIXER

6000 +18 dBm
750 or higher +4 dB (12.3V into 6000)
MAIN Transformer impedance (1.23V) or 3 pin, XLR type
OUTPUT Balanced lines +24 d8 (21.8V into male connector
15 kI7)

6000 TIP connector LINE or higher -10 dB +24 dB of'/, inch, 3 OUTPUTS 1000 impedance (245 mV) (12.3V) circuit (stereo)
lines phone jack (T.P.S.)
TTL VOL = 1.OV VOH = 4.OV RING connector
LOGIC Logic or max min of y4 inch, 3
OUTPUTS 5000 Relay at lo = 2.0 mA at lo = 2.0 mA circuit (stereo)
Driver sink source phone jack (F.R.S.)

LINK 10KC) PREMIX MIX +24 dB 5-pin, XLR type OUTPUT 1000 Link -20 dB 0 d8 . (12.3V) male connector
(MIX & Input (77.5 mV) (775 mV)
PREMIX