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Zaxcom ZMT4 Flex                                                                                                                  Audio Menu

 

18 

Dynamics  

 

 

 

 

The dynamics is a soft knee compressor that is located after the analog to digital converter which will limit 

the dynamic range to prevent clipping during occurrences of loud audio. Dynamics is comprised of both a 

compressor and an expander, which operate jointly

The compressor in the dynamics can set to mild or 

extreme compression and features a soft knee for more transparent operation. 

 

To enter the Dynamics Menu 

Press the INC or DEC key - “PARMS” (parameters) will be displayed on the right.   

To move to the next parameter, press the MENU key.   

To exit this page, hold the MENU key for 1 second. 

 

Dynamics Parameters

 

 

Link L-R:  

OFF / ON:

 

If using a stereo transmitter this links the left and right signal so if one side of the signal 

needs compressing / expansion the other side will do the same to match.

 

 

SPEED 

(Decay Speed)

 :

  SLOWEST / SLOW / NORMAL / FAST / FASTEST 

Sets how 

gradual the signal level decreases after a signal reaches the threshold setting. This is typically set 

to FAST.

 

 

ATTACK 

(Attack Speed) :  SLOWEST / SLOW / NORMAL / FAST / FASTEST 

Sets the speed in how 

fast the gain is reduced once the signal exceeds the threshold setting. This is typically 

set to FAST.

 

 

CMP RATIO 

(Compressor Ratio)

:

  Valid range: 1.0: to 5.0:1, in 0.1

 

steps

.

 

The amount of gain reduction is determined by the compressor ratio setting. 

A compressor ratio for example of 2.0:1 means for every 1 dB above the compressor threshold the gain will 

be reduced 2dB. A higher ratio setting makes the compressor more aggressive. 

 

CMP THRESH

 (Compressor Threshold):  Valid range:  0 to –96dB, in 1dB steps. 

This sets the level in which gain reduction occurs. 

 

CMP KNEE:

  (Compressor Soft Knee):  Valid range:  0 to 20dB, In 1dB steps. 

Sets the compressor's soft knee. A soft knee reduces “softens” the audible change from uncompressed to 

compressed, this is useful especially for higher ratios where the changeover is more noticeable  

 

EXP RATIO 

(Expansion Ratio)

:

  Valid range: 1:1.00 to 1:4.00, In 0.01 steps 

Sets the expansion ratio. For example a 1:2.0 expansion ratio means for every 1 dB below the expansion 

threshold the gain will be reduced 2dB. 

 

EXP THRESH 

(Expansion Threshold)

:

  Valid range:  0 to –96dB, in 1dB steps. 

Sets the threshold above which gain reduction occurs.  

 

REDUCE

 (Expander Gain Reduction)

:

  Valid range:  0 to –36dB, in 1dB steps. 

This sets the limit on the amount of gain reduction caused by the expander.  

 

GAIN

 (Make-up Gain)

:

  Valid range:  0 to 30dB, In 1dB steps.

 

Gain is used to compensate for the gain reduction caused by the compressor. Because the compressor is 

reducing the gain (or level) of the signal, the ability to add a fixed amount of make-up gain at the output is 

provided so that an optimum level can be reached.

DYNAMICS 

Summary of Contents for ZMT-421

Page 1: ...1 USER MANUAL Published January 2022 Firmware Version ZMT 421 ZMT4 FLEX Transforming Audio...

Page 2: ...FRAME RATE ENABLE 9 TRANSMIT MENU 10 UHF TRANSMITTER POWER LEVEL SET 10 UHF TRANSMIT MODULATION SET 10 TRANSMITTER DISABLE RECORD ONLY MODE 10 RECORD MENU 11 SD CARD FORMAT 11 PLAYBACK CONTROL 11 TIME...

Page 3: ...21 HIDE TRANSMITTER NAME MENU 21 TRANSMITTER NAME SET 21 RECORDING FORMAT 22 FIRMWARE 23 UPDATING THE ZMT4 FLEX FIRMWARE 23 UPDATING ERX FIRMWARE WITH A ZMT4 FLEX TRANSMITTER 23 UPDATING QRX FIRMWARE...

Page 4: ...of a menu item When in the home screen pressing INC with the CARD key will put the transmitter into record When in the transport control screen while not recording will cause the transmitter to playb...

Page 5: ...segments Battery This displays the battery type and the approximate percentage of remaining battery power Audio Meter Displays the modulation of the inputted audio signal SEG Gain G Appears when the t...

Page 6: ...ges When the lock page is landed on a countdown clock will begin After 5 seconds the transmitter will lock and the display will indicated that it is LOCKED If this screen is exited before the 5 second...

Page 7: ...the transmitter Accessing and navigating the menu groups From in the home screen press the CARD key three times or hold the MENU key while booting up to access the six menu groups Then pressing the I...

Page 8: ...t s meter Any level above 10 may cause clipping which will prevent proper reading of time code TC Jam Mode Select This menu controls if the ZMT4 Flex will go into record when it receives a record run...

Page 9: ...being transmitted from the ZaxNet transmitter that is feeding the ZMT4 Flex If auto frame rate is set to OFF the frame rate will need to be adjusted manually Please note that auto frame rate will only...

Page 10: ...mat the ZMT4 Flex will need to be rebooted by pressing the card key before the new format takes effect MONO STEREO XR ZHD 96 ZHD 48 Modulation Bandwidth 200 kHz 196 kHz 200 kHz 96 kHz 48 kHz Minimum C...

Page 11: ...longer recognized by the transmitter or by ZaxConvert a partial format can be done The partial format rewrites the FAT32 file structure and leaves the recorded audio untouched To do a partial format...

Page 12: ...art recording Low Battery Stop Set Low battery stop will set the amount of time after a low battery warning occurs the on board recorder will close the current file and stop recording This is to preve...

Page 13: ...ency is the frequency that the ZMT4 Flex will get its wireless time code and remote control commands on This frequency will need to match the frequency of the corresponding ZaxNet transmitter The ZaxN...

Page 14: ...ZMT4 Flex is assigned a unit code The unit code is a unique number used to identify each ZMT4 Flex within a particular group This allows individual transmitters within the same group to be independent...

Page 15: ...nsceiver will only receive ZaxNet and NOT go into transmit mode Therefore no ZaxNet TC and or audio will be transmitted This setting shuts off the ZaxNet transmitter Receive then Transmit mode After b...

Page 16: ...ches for ZaxNet time code The settings are NEVER or any interval between 5 and 999 seconds Record Beep Set This menu will only appear if ZaxNet is set to transmit TX mode When the record beep is set t...

Page 17: ...ter is turned on and adjusted from this menu The high pass filter range is 40Hz to 220Hz in 10Hz increments 2K Notch Filter The 2K notch filter is useful in removing digital RF interference that can b...

Page 18: ...steps The amount of gain reduction is determined by the compressor ratio setting A compressor ratio for example of 2 0 1 means for every 1 dB above the compressor threshold the gain will be reduced 2...

Page 19: ...T4 Flex after boot up LOCKED After boot up has completed the transmitter will automatically go into lock mode and the keys will be locked to prevent accidental changes to the settings UNLOCKED After b...

Page 20: ...intervals Information Page This page displays the current firmware version the serial number the DSP version and the option code Hide Encryption Menu This setting will hide the encryption menu A hidde...

Page 21: ...e MENU key for 1 second Hide Transmitter Name Menu This setting will hide the name menu A hidden name menu allows for quicker navigation and prevents accidental changes HIDDEN The name menu doesn t ap...

Page 22: ...must be formatted in a 3 series transmitter to work properly cards formatted in any other series transmitter will not record properly Please note that regardless of the size of the card the onboard r...

Page 23: ...30 seconds 8 Upon completion cycle the power and confirm that the transmitter is running the new firmware WARNING Before updating the firmware be sure to insert a fresh battery and do not power down t...

Page 24: ...n will display waiting for program This indicates the receiver is ready to download the new firmware This can be done to several QRXs so they will be updated at the same time 5 At the transmitter proc...

Page 25: ...x Operating Frequencies 25 Operating Frequencies ZaxNet Remote Control and Time Code 2 403 to 2 475 GHz UHF Audio ZMT4 5 512 0 MHz to 614 0 MHz Blocks 20 through 23 ZMT4 6 596 0 MHz to 698 0 MHz Block...

Page 26: ...Zaxcom ZMT4 Flex Antenna Cutting Chart 26...

Page 27: ...dates Download the latest User Manuals from http zaxcom com support updates Submit Technical Questions at http www zaxcom com submit a technical question Submit information for Repair Services at http...

Page 28: ...2 Input Range 60 to 30 dBu ADC Bit Depth 24 Bits ADC Sampling Rate 48kHz Time code Reader Generator Clock Accuracy 1 54PPM 1 Frame Out in 6 Hours Time code Type SMPTE Time code Frame Rates 23 98 24 25...

Page 29: ...ar Product Limitation of Remedies Your exclusive remedy for any defective Product is limited to the repair or replacement of the defective Product Zaxcom may elect which remedy or combination of remed...

Page 30: ...ente p i r e ne d passe pas l intensit n cessaire l tablissement d une communication satisfaisante Le pr sent metteur radio PR6 XRT a t approuv par Industrie Canada pour fonctionner avec les types d a...

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