Rear Panel DIP Switches
Last updated
Last updated
The rear panel of the Hx1 and Hx2 chassis contain two banks of DIP switches labeled "Settings" and "Options."
The "Settings" switches (SW1) control the operational levels of various signal processing stages. The "Options" switches (SW2) are used to configure various features. The tables below explain the individual DIP switches:
Options Bits 1 and 2 control the overall operation of the DDEQ processing function. Selections include OFF, Fixed EQ, Adaptive EQ, or Adaptive + Fixed EQ. See the Digital Dynamic Equalization section for an explanation of each.
You can separately specify the level of adjustment in the EQ HI and EQ LO frequency bands when the DDEQ mode is configured for Fixed EQ mode. SETTINGS Bits #1 and #2 control the dB adjustment for the EQ HI band, and Bits #3 and #4 control the dB adjustment for the EQ LO band as follows:
SETTINGS
SETTINGS
We encourage you to try varying levels of EQ boost to make your telephone audio sound warmer and clearer. Our factory default settings should be considered a safe starting point, but because tastes and situations differ, we don’t presume to make those choices for you. Our testing does suggest that utilizing the full 6 db boost works well in most cases and dramatically enhances telephone audio, but we suggest that you set up your phones like you would any other audio processing device: Adjust, listen critically, and repeat the process until you’re satisfied.
SETTINGS Bits #5 and #6 control the overall operation of the Ducker processing function. See the Ducking system section for an explanation of each setting, including full-duplex (no ducking), -6 dB, -12 dB, or half-duplex (one way at a time).
SETTINGS
SETTINGS Bits #7 and #8 jointly control the operation of the receive AGC and Noise Gate processing functions. You can select how aggressively low-level signals are brought up to the nominal (+4 dBu) level using the following bit settings:
SETTINGS
OPTIONS Bits #3 and #4 jointly control the operation of the Auto-Answer feature of the hybrid. You can select between turning the feature off, or set the number of rings before the incoming call is answered and then placed on air as follows:
OPTIONS
The Hx1 and Hx2 hybrid units have been designed to send a -9 dBu average level to the telephone line in order to meet the USA’s FCC regulations. OPTION Bit #5 adds 3 dB of gain to the send level heard by the caller. This should only be used when the hybrid is connected to a PBX or in countries outside of the USA that permit a higher transmit level.
OPTIONS
The Hx2 can operate as two independent hybrids or be configured to perform an internal mix- minus between the two hybrids.
The Hx 1 and Hx2 have an optional Acoustic Echo Canceler in the Studio send path. This can be used when there is acoustic coupling between a loudspeaker connected to the hybrid output and a microphone connected to the input. Enabling feedback reduction also causes the ducker to insert more loss into the announcer-to-caller direction when the caller is dominant.
OPTIONS Bit #8 is set aside as RESERVED for future use.
OPTIONS
Settings
Function
Bits 1 and 2
EQ LO, fixed dB gain adjustment
Bits 3 and 4
EQ HI, fixed dB gain adjustment
Bits 5 and 6
Ducking dB gain adjustment
Bits 7 and 8
AGC and Noise Gate settings
Options
Functions
Bits 1 and 2
DDEQ configuration
Bits 3 and 4
Auto-answer configuration
Bit 5
Send gain to phone
Bit 6
Hx2 internal mix-minus enable
Bit 7
Feedback Reduction enabled
Bit 8
Reserved
Bit 1
Bit 2
Setting Value
OFF
OFF
DDEQ turned OFF
OFF
ON
DDEQ enabled in Fixed EQ mode (use SETTINGS Bits 1-4 to set levels)
ON
OFF
DDEQ enabled in Adaptive EQ mode (factory default setting)
ON
ON
DDEQ enabled in Adapt + EQ mode (use SETTINGS Bits 1-4 to set levels)
Bit 1
Bit 2
Setting Value
OFF
OFF
EQ LO, 0 dB adjustment (factory default setting)
OFF
ON
EQ LO, +2 dB adjustment
ON
OFF
EQ LO, +4 dB adjustment
ON
ON
EQ LO, +6 dB adjustment
Bit 3
Bit 4
Setting Value
OFF
OFF
EQ HI, 0 dB adjustment (factory default setting)
OFF
ON
EQ HI, +2 dB adjustment
ON
OFF
EQ HI, +4 dB adjustment
ON
ON
EQ HI, +6 dB adjustment
Bit 5
Bit 6
Setting Value
OFF
OFF
Full Duplex (no attenuation)
OFF
ON
-6 dB attenuation (factory default setting)
ON
OFF
-12 dB attenuation
ON
ON
Half Duplex
Bit 7
Bit 8
AGC Setting Value
Noise Gate Setting Value
OFF
OFF
Phone AGC = OFF
Noise Gate = OFF
OFF
ON
Phone AGC = 1/2 Full
Noise Gate = OFF
ON
OFF
Phone AGC = Full
Noise Gate = OFF (factory default setting)
ON
ON
Phone AGC = Full
Noise Gate = Normal
Bit 3
Bit 4
Auto-Answer Setting Value
Ring Setting Value
OFF
OFF
Auto-answer = OFF
Disabled (factory default setting)
OFF
ON
Auto-answer = ON
Auto-answer after first ring
ON
OFF
Auto-answer = ON
Auto-answer after third ring
ON
ON
Auto-answer = ON
Auto-answer after eighth ring
Bit 5
Setting Value
OFF
No additional gain applied (factory default setting)
ON
+3 dB additional gain applied to audio sent to the caller
Bit 6
Setting Value
OFF
Independent - Internal mix-minus disabled (factory default setting)
ON
Coupled - Internal mix-minus enabled
Bit 7
Setting Value
OFF
Acoustic Echo Canceler disabled (factory default setting)
ON
Acoustic Echo Canceler enabled (use in "open speaker" situation)
Bit 8
Setting Value
OFF
Reserved for future use (factory default setting)
ON
Not recommended
