Extron electronic manual Audio master, SWP123 Presentation Switcher Specifications

Output level	TTL: 4 V to 5 Vp-p, unterminated
Input impedance	510 ohms
Output impedance	75 ohms
Max input voltage	5 Vp-p
Max. propagation delay	8 ns
Max. rise/fall time	28 ns
Polarity	Positive or negative (follows input)

Audio — master

Gain	Unbalanced output: 0 dB; balanced output: +6 dB
Frequency response	10 Hz to 175 kHz, -3 dB
	20 Hz to 20 kHz, ±0.05 dB
THD + Noise	<0.06% @ 1 kHz at nominal level
S/N	>87.0 dB at maximum output

Audio — individual audio groups (VGA, S-video, composite video)

Gain	Unbalanced output: 0 dB; balanced output: +6 dB
Frequency response	10 Hz to 175 kHz, -3 dB
	20 Hz to 20 kHz, ±0.05 dB
THD + Noise	<0.03% @ 1 kHz at nominal level
S/N	>87.0 dB at maximum output
Crosstalk	<-89 dB @ 1 kHz
Stereo channel separation	>89 dB @ 1 kHz
CMRR	>60 dB @ 20 Hz to 20 kHz

Audio input — individual audio groups (VGA, S-video, composite video)

Number/signal type	4 sets of stereo, unbalanced inputs per group (12 inputs total)
Connectors	4 pairs of female RCA connectors per group
Impedance	>20k ohms unbalanced, DC coupled
Nominal level	-10 dBV (316 mV)
Maximum level	+18 dBu, (balanced or unbalanced) at 1%THD+N
Input gain
Input to Master output ...	-64 dB to 0 dB, adjustable per input
Input to group output	Unity

0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV 2 dBu

Audio output — individual audio groups (VGA, S-video, composite video)

Number/signal type	1 passive, local, stereo, balanced/unbalanced per each group
Connectors	(1) 3.8 mm captive screw connector, 5 pole, per each group
Impedance	50 ohms unbalanced, 100 ohms balanced
Gain error	±0.01 dB channel to channel
Maximum level (Hi-Z)	>+24 dBu, balanced at 1%THD+N
Maximum level (600 ohm)	>+18 dBm, balanced at 1%THD+N

Microphone input

Number/type	1 mono, balanced
Connectors	1 XLR female
Impedance	1.8k ohms, balanced/unbalanced
Nominal level	-48 dBV (1 mV)
Minimum level	-72 dBV (0.25 mV)

SWP123 Presentation Switcher • Specifications A-3