TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com
TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com
TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com
TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com
TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com
TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com
TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com
TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com
TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com
TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com
TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com
TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]-www.prostudioconnection.com

TrueTime Symmetricom XL-DC GPS Downconverter NTP Server FTM III Line Frequency [Refurbished]

( 362585254026) )

Regular price $682.00 Sale price $999.00      (1 available in stock)

GPS Atomic Timecode Receiver • Downconverter Antenna Included • FTM III Line Frequency Measurement Option (87-360-111) • Large LCD Time Display • 10MHz/5MHz/1MHz GPSDO • IRIG-B / 1PPS • 115V or 230V Power

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Actual item for sale

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Description

Here's a lightly used TrueTime/Symmetricom XL-DC GPS time receiver/timecode generator with a TCXO oscillator. In very good condition and I believe based on my testing fully working. This unit requires a Downconverter type antenna, and one of the appropriate type is included. It will not work with a regular GPS antenna. The Downconverter allows the antenna and receiver to be connected by a long cable run as this arrangement reduces downlead signal attenuation by transmitting the received signals at a much lower frequency than the normal GPS frequency band. The buyer will need to provide a suitable cable - the antenna takes a TNC connector and the receiver a BNC connector.

In my testing I was able to achieve lock with the included antenna, but it did seem that this type of antenna requires a very good view of the sky to maintain sync.  If your point of reception is marginal in terms of its view of the sky, I would recommend sticking with a unit that uses a normal (ie. non-downconverter) antenna.

The receiver is equipped with a 87-360-111 FTM III line frequency measurement module which may be used to measure AC line frequency using the second IEC320 socket on the rear panel. Use Function 27 to access the config for this module - see the manual for more detail.  It also has a network interface card which acts as an NTP Time Server.  An AUI to RJ45 Ethernet converter can be obtained cheaply if required.

The internal lithium battery used to maintain the time and settings under power loss conditions has just been replaced so should not need further attention for a number of years. This unit has 1MHz/5MHz/10MHz frequency outputs on the three upper right output jacks (unlabelled). The left LCD screen does not have a backlight. The photos show the actual item for sale. Rack ears are included as shown. No unpictured cables, accessories or documents are included.

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Actual item for sale

Features

  • Less Than 40 Nanoseconds rms Accuracy to UTC During Selective Availability (SA)*
  • Better Than 1x10-12 Frequency Accuracy
  • Versatile and Modular Architecture
  • Supports Many Different Output Options
  • 10Mhz, 5MHz and 1MHz frequency outputs
  • 1 PPS Output
  • IRIG B Time Code Output

Test Results

f18
TRUETIME Mk III sys ver 021 GPS-XL V1.037 182-6318v002
f51
F51 +50ns
f53
F53 AUTO: 4 SATS
f56
F56 N 28d32'11.2" W 082d39'9.5" 6m COUNT 10800 / 90000
f60
F60 prn 22 good enabled tracked current sig level= +11.56
F60 prn 2 good enabled sig level= +0.00
F60 prn 20 good enabled sig level= +0.00
F60 prn 5 good enabled sig level= +0.00
F60 prn 1 good enabled sig level= +0.00
F60 prn 18 good enabled sig level= +0.00
F60 prn 26 good enabled tracked current sig level= +10.32
F60 prn 29 good enabled sig level= +0.00
F60 prn 24 good enabled sig level= +0.00
F60 prn 17 good enabled sig level= +0.00
F60 prn 15 good enabled sig level= +0.00
F60 prn 9 good enabled sig level= +0.00
F60 prn 27 good enabled sig level= +0.00
F60 prn 25 good enabled sig level= +0.00
F60 prn 19 good enabled sig level= +0.00
F60 prn 14 good enabled sig level= -2.01
F60 prn 16 good enabled sig level= +0.00
F60 prn 21 good enabled sig level= +0.00
F60 prn 23 good enabled sig level= +0.00
F60 prn 28 good enabled sig level= +0.00
F60 prn 7 good enabled sig level= +0.00
F60 prn 31 good enabled tracked current sig level= +14.77
F60 prn 13 good enabled sig level= +0.00
F60 prn 12 good enabled sig level= +0.00
F60 prn 3 good enabled tracked current sig level= +9.20
F60 prn 4 good enabled sig level= +0.00
F60 prn 6 good enabled sig level= +0.00
F60 prn 8 good enabled sig level= +0.00
F60 prn 10 good enabled sig level= +0.00
F60 prn 11 good enabled sig level= +0.00
F60 prn 30 good enabled sig level= +0.00
F60 prn 32 good enabled sig level= -0.00
f68
F68 2019
f69
F69 UTC
f71
F71 phase=-2.294E-08 s offset=-1.830E-10 drift=-6.530E-07/DAY DAC=-13748
f72
F72 Antenna: OK PLL: OK GPS: Locked

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