ADTRAN 239 H2R-PSD Instruction Manual

61221045L2-5A 1
239 H2R-PSD
2-Wire High Bit Rate Digital Subscriber Line Repeater
Installation and Maintenance
Section 61221045L2-5A
Issue 1, December 2002
CLEI Code: T1R6VJWD_ _
CONTENTS
1. GENERAL..........................................................1
2. INSTALLATION ...............................................2
3. FRONT PANEL FEATURES............................4
4. DEPLOYMENT GUIDELINES ........................5
5. MAINTENANCE...............................................6
6. SPECIFICATIONS ............................................7
7. WARRANTY AND CUSTOMER SERVICE...7
Appendix A. HDSL2 Loopbacks ...........................A-1
FIGURES
Figure 1. ADTRAN 239 H2R .................................1
Figure 2. Card Edge Pin Assignments.....................2
Figure 3. First Segment Deployment Guidelines ....5
Figure 4. Second Segment Deployment
Guidelines ................................................5
TABLES
Table 1. Compliance Codes ...................................2
Table 2. 239 H2R Capacity Guidelines ................. 3
Table 3. LED Indications .......................................4
Table 4. First Segment Loop Insertion
Loss Data.................................................. 6
Table 5. Second Segment Loop Insertion
Loss Data.................................................. 6
Table 6. ADTRAN 239 H2R Specifications..........7
Table A-1. In-Band Addressable Loopback
Codes....................................................A-2
Figure 1. ADTRAN 239 H2R
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
1. GENERAL
This practice provides installation and maintenance
instructions for the ADTRAN Enhanced PSD 239 T1
HDS 2 Repeater (ADTRAN P/N 1221045 2).
Figure 1 is an illustration of the H2R equipment
which includes these features:
• Enhanced PSD
• HDS 2 line coding
• ightning protection
• In-band loopback control
• Designed for use in standard DDS or ISDN
repeater apparatus case (239 mechanics)
• Remote provisioning and pass-through
performance monitoring
The ADTRAN Enhanced PSD 239 H2R can
effectively extend the deployment range of the
HDS 2 loop up to 17 kft over 26-AWG cable.
Compatible ADTRAN HDS 2 transceiver units are as
follows:
Part Number Unit Name
1181111 X............. Total Access 3000 H2TU-C
1181112 X............. 2nd Generation Total Access
3000 H2TU-C
1221001 X............. 220/E220 H2TU-C
1221003 X............. DDM+ H2TU-C
1221004 X............. 3192 H2TU-C
1221007 4 ............. Soneplex® H2TU-C
1222001 X............. 2nd Generation 220/E220
H2TU-C
1222003 X............. 2nd Generation DDM+
H2TU-C
1222004 X............. 2nd Generation 3192
H2TU-C
1222007 4 ............. 2nd Generation Soneplex
H2TU-C
1222026 9 ............. Enhanced PSD T200
H2TU-R
239 H2R
1221045L2
DSL
DSL CUST
NET
LL
(Y) RL (G)

261221045L2-5A
1223001 X............. 3rd Generation 220/E220
H2TU-C
1223003 X............. 3rd Generation DDM+
H2TU-C
1223004 X............. 3rd Generation 3192
H2TU-C
1223007 4 ............. 3rd Generation Soneplex
H2TU-C
1223026 X............. 3rd Generation Enhanced
PSD T200 H2TU-R
1223024 X............. 3rd Generation T200
H2TU-R
The Enhanced PSD 239 H2R, Part Number
1221045 2, must be used in conjunction with one of
these 3rd Generation T200 H2TU-Rs: P/N
1223026 1, 5, 7, 9, P/N 1223024 x ocal Power
Only or the 2nd Generation P/N 1222026 9. This
H2R will not function with any other H2TU-Rs. All
previous generation T200 H2TU-Rs will function with
the 12221045 1 standard PSD H2R, but the enhanced
spectral performance will only be achieved using the
Enhanced PSD 239 H2R, P/N 1221045 2.
There are no manual option settings on the H2R.
H2R operating power is derived from an H2TU-C,
independent of line impedance or wire gauge. The
operating power from the H2TU-C can also be used to
span power the H2TU-R.
2. INSTALLATION
C A U T I O N
C A U T I O N
!
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
After unpacking the unit, inspect it for damage. If
damage is discovered, file a claim with the carrier,
then contact ADTRAN. Refer to Warranty and
Customer Service.
Compliance
Table 1 lists the Compliance Codes for the 239 H2R.
NOTE
This product is intended for installation in
equipment with a Type “B” or ”E” enclosure.
WARNING
Up to -200 VDC may be present on
telecommunications wiring. Ensure chassis
ground is properly connected.
This product is connected to equipment that provides
span powering voltage (negative only with respect to
ground, -190 VDC nominal, GFI protection < 5 mA)
and meets all requirements of Bellcore GR-1089-
CORE (Class A2), ANSI T1.418-2002. This product
is NRT listed to the applicable U standards.
When installing the ADTRAN 239 H2R, refer to the
ADTRAN Installation/Maintenance practice for the
housing being used. All connections are made
through card edge connectors. Figure 2 gives the
card edge pin assignments.
NOTE
Ensure that the chassis ground is securely
connected to apparatus case. Ground pin
designations are defined in Figure 2.
12 11 10 9 8 7 6 5 4 3 2 1
GND
NC
CUSTOMER
NETWORK
SIDE 1
NC
NETWORK
GND
CUSTOMER
SIDE 2
BYPASS
Figure 2. Card Edge Pin Assignments
Code Input Output
Power Code (PC) C C
Telecommunication Code (TC) X X
Installation Code (IC) A –
Table 1. Compliance Codes

61221045L2-5A 3
The ADTRAN 239 H2R is designed for installation in
a prewired apparatus case, and the capacity guidelines
for deployment are defined in Table 2.
Table 2. 239 H2R Capacity Guidelines
noitpircseDrebmuNtraPedoCIELCstolSlairetaMbutSscinahceMevobA dnuorG woleB dnuorG
NARTDA 934/932 1L7200511 2L7200511 AM1ABAOMDD AM1ABBOMDD 4sselniatS emoDleetS eroc-riA dellif-leG 934/932DBT
1
DBT
1
NARTDA 934/932 4L0102511 3L0102511 CM1OABOMDD CM1OABOMDD 2citsalPxolaV eroc-riA dellif-leG 934/93222
tolS-4NARTDA lasrevinU 1L7500511 2L7500511 AR1OADOMDD AR1OACOMDD 4leetSsselniatS eroc-riA dellif-leG 918/934/93244
tolS-8NARTDA lasrevinU 1L8500511 2L8500511 AR1OEEOMDD AR1OEFOMDD 8leetSsselniatS eroc-riA dellif-leG 918/934/93288
NARTDA tolS-61
1L6180911 2L6180911 3L6180911
AR10SEOMDD AR10SFOMDD AR10SMOMDD 61leetSsselniatS eroc-riA dellif-leG dellif-riA
934/932 )A918on( DBT
1
DBT
1
&letpeK,T&TA tolS52NOCABA 918 52remyloPA918/9322161
2
letpeK/T&TA tolS-21 90821remyloP93288
IIrotaidaRCDA/CPS61leetSsselniatS eroc-riA dellif-leG 9326161
acriC/NOCABA21remyloP eroc-riA dellif-leG 9322121
acriC/NOCABA61remyloP eroc-riA dellif-leG 932DBT
1
DBT
1
sirrA/cetnA0288remyloPeroc-riA932DBT
1
DBT
1
rotaidaRCDA888
resacnECDA424242
1
ssergorpnignitseT
2
.)Cº1.64(Fº511deecxetondluohsgnisuohehtotlellarapdnayawatf1derusaemerutarepmetriatneibmaeht,esutols61roF

461221045L2-5A
NOTE
These capacity guidelines were generated
through extensive testing per Bellcore guidelines
GR-487-CORE, requiring units to operate
normally at ambient temperatures up to 47°C,
with solar loading. When installing the
ADTRAN 239 H2R, refer to the ADTRAN
Installation/Maintenance practice or other
manufacturer’s documentation for the housing
being used.
NOTE
For use in other housings, the H2R dissipates a
maximum of 5.2 watts.
The ADTRAN 239 H2R is designed for deployment
using any 239-type repeater case.
3. FRONT PANEL FEATURES
The ADTRAN H2R front panel has three EDs
indicating different states of the HDS 2 circuit.
Table 3 explains the meaning of the different ED
indicators.
Table 3. LED Indications
239 H2R
1221045L2
DSL
DSL CUST
NET
LL
(Y) RL (G)
DELnoitacidnInoitpircseD
TENLSD ffO neerGdiloS
neerGgnihsalFtsaF
neerGgnihsalFwolS
wolleYdiloS
wolleYgnihsalFwolS )ces/1(
deRdiloS deRgnihsalFwolS
C-UT2HehthtiwnoitazinorhcnysoN denifedresuehtnahtretaergnigramRNSnahtiwdezinorhcnyS dlohserhTmralAnigraMRNS htiwezinorhcnysotgnitpmettA)dnocesrepsemiteerhtgnihsalF( C-UT2Heht nigramRNSnahtiwdezinorhcnyS)dnocesrepemitenognihsalF( dna,dlohserhTmralAnigraMRNSdenifedresuehtnahtretaerg pooLdenifedresuehtnahtretaergsinoitaunettaeslupeht dlohserhTmralAnoitaunettA nahtsseltubBd0nahtretaergnigramRNSnahtiwdezinorhcnyS dlohserhTmralAnigraMRNSdenifedresueht nahtsseltubBd0nahtretaergnigramRNSnahtiwdezinorhcnyS eslupehtdna,dlohserhTmralAnigraMRNSdenifedresueht noitaunettApooLdenifedresuehtnahtretaergsinoitaunetta dlohserhTmralA Bd0nahtretaergnigramRNSnahtiwdezinorhcnyS nigramRNSnahtiwdezinorhcnyS)dnocesrepemitenognihsalF( denifedresuehtnahtretaergsinoitaunettaeslupehtdnaBd0fo dlohserhTmralAnoitaunettApooL
TSUCLSD ffO neerGdiloS
neerGgnihsalFtsaF
neerGgnihsalFwolS
wolleYdiloS
wolleYgnihsalFwolS )ces/1(
deRdiloS deRgnihsalFwolS
R-UT2HehthtiwnoitazinorhcnysoN denifedresuehtnahtretaergnigramRNSnahtiwdezinorhcnyS dlohserhTmralAnigraMRNS htiwezinorhcnysotgnitpmettA)dnocesrepsemiteerhtgnihsalF( R-UT2Heht nigramRNSnahtiwdezinorhcnyS)dnocesrepemitenognihsalF( dna,dlohserhTmralAnigraMRNSdenifedresuehtnahtretaerg pooLdenifedresuehtnahtretaergsinoitaunettaeslupeht dlohserhTmralAnoitaunettA nahtsseltubBd0nahtretaergnigramRNSnahtiwdezinorhcnyS dlohserhTmralAnigraMRNSdenifedresueht nahtsseltubBd0nahtretaergnigramRNSnahtiwdezinorhcnyS eslupehtdna,dlohserhTmralAnigraMRNSdenifedresueht noitaunettApooLdenifedresuehtnahtretaergsinoitaunetta dlohserhTmralA Bd0nahtretaergnigramRNSnahtiwdezinorhcnyS nigramRNSnahtiwdezinorhcnyS)dnocesrepemitenognihsalF( denifedresuehtnahtretaergsinoitaunettaeslupehtdna,Bd0fo dlohserhTmralAnoitaunettApooL
LR/LL neerG wolleY evitcasiR-UT2HehtdrawotR2HehttakcabpoolasetacidnI evitcasiC-UT2HehtdrawotR2HehttakcabpoolasetacidnI

61221045L2-5A 5
4. DEPLOYMENT GUIDELINES
The ADTRAN HDS 2 system is designed to provide
DS1 based services over loops designed to comply
with Carrier Service Area (CSA) guidelines. CSA
deployment guidelines are given below. These
guidelines are only applicable to the first segment of
the HDS 2 circuit, between the H2TU-C and the
extender.
1. All loops are nonloaded only.
2. For loops with 26-AWG cable, the maximum
loop length including bridged tap lengths is 9 kft.
3. For loops with 24-AWG cable, the maximum
loop length including bridged tap lengths is 12
kft.
4. Any single bridged tap is limited to 2 kft.
5. Total bridged tap length is limited to 2.5 kft.
6. The total length of multigauge cable containing
26-AWG cable must not exceed:
12 -{(3* 26 )/(9- BTAP )}(in kft)
26 = Total length of 26-AWG cable
excluding bridged taps (in kft)
BTAP = Total length of all bridged taps
(in kft)
This deployment criteria is summarized in the chart
shown in Figure 3.
The guidelines listed below are applicable to the
second segment of the HDS 2 circuit, between the
extender and the H2TU-R.
1. All loops are nonloaded only.
2. For loops with 26–AWG cable, the maximum
loop length including bridge tap lengths is 8 kft.
3. For loops with 24-AWG cable, the maximum
loop length including bridged tap lengths is 11
kft.
4. Any single bridge tap is limited to 2 kft.
5. Total bridge tap length is limited to 2.5 kft.
6. The total length of multigauge cable containing
26-AWG cable must not exceed:
11 - {(3* 26)/(8- BTAP)} (in kft)
26 = Total length of 26-AWG cable
excluding bridged taps (in kft)
BTAP = Total length of all bridged taps
(in kft)
This deployment criteria is summarized in the chart
shown in Figure 4.
0
12
11
10
9
8
7
6
5
4
3
2
1
01234
WORKING LENGTH OF 26 GAUGE CABLE (KFT)
WORKING LENGTH OF 24 GAUGE (OR COARSER) CABLE (KFT)
56789
2.5 2.0 1.5 1.0 0.5 0.0
TOTAL
BRIDGED
TAP
LENGTH
(KFT)
VALID CSA CABLE LENGTHS
INVALID CSA CABLE LENGTHS
Figure 3. First Segment Deployment
Guidelines
Figure 4. Second Segment Deployment
Guidelines
0
0
1
2
3
4
5
6
WORKING LENGTH OF 24 GAUGE (OR COARSER) CABLE (KFT)
7
8
9
10
11
12
1
VALID HDSL CABLE LENGTHS
VALID HDSL CABLE LENGTHS
INVALID HDSL CABLE LENTTHS
INVALID HDSL CABLE LENGTHS
2.5 2.0 1.5 1.0 0.5 0.0
2.5 2.0 1.5 1.0 0.5 0.0
234
WORKING LENGTH OF 26 GAUGE CABLE (KFT)
56789
For further information regarding deployment
guidelines and applications, refer to ADTRAN’s
Supplemental Deployment Information for HDSLX,
Document 61221HDS 1-10.

661221045L2-5A
Recommended maximum local loop loss information
for PIC cable at 70°F, 135 Ω, resistive termination is
provided in Table 4 for the first segment of the
circuit.
Table 5 provides local loop loss information for the
second segment of the circuit.
An approximation for the maximum amount of
wideband noise on a DS local loop as measured by a
50 kb filter is ≤ 31 dBrn.
An approximation for the maximum level of impulse
noise as measured using a 50 kb filter on a DS loop
is ≤ 50 dBrn.
These approximations are to be used as guidelines
only and may vary slightly on different loops.
Adhering to the guidelines should produce
performance in excess of 10-7 BER.
5. MAINTENANCE
The ADTRAN 239 H2R requires no routine
maintenance. In case of equipment malfunction,
perform an in-band loopback from the central office
(CO), as defined in Appendix A. If a malfunction is
confirmed, replace the unit.
The ADTRAN 239 H2R has looping capability
through the channel allowing digital loopback in fault
isolation. The looping is accomplished remotely as
defined in Appendix A of this practice.
Performance monitoring, diagnostics, and loopbacks
are also available from the craft interface at the
H2TU-C and H2TU-R.
When testing indicates a faulty circuit pack, refer to
the housing installation/maintenance practice for the
entry and pressurization control, then replace the
faulty circuit pack.
ADTRAN does not recommend field repair of this
unit. Repair services may be obtained by returning
the defective unit to the ADTRAN Customer and
Product Support (CAPS) Department.
Table 4. First Segment Loop Insertion
Loss Data
)zH(ycneuqerF)Bd(ssoLmumixaM
000,3 000,01 000,05 000,001 000,051 000,691 000,002 000,052 000,523 0.21 0.51 5.52 0.03 57.23 0.53 52.53 5.73 00.24
Table 5. Second Segment Loop Insertion
Loss Data
)zH(ycneuqerF)Bd(ssoLmumixaM
000,3 000,01 000,05 000,001 000,051 000,691 000,002 000,052 000,523 52.11 05.31 57.22 57.62 00.92 52.13 05.13 57.33 00.73

61221045L2-5A 7
6. SPECIFICATIONS
Specifications for the ADTRAN 239 H2R are detailed
in Table 6.
7. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within
the warranty period if it does not meet its published
specifications or fails while in service. Warranty
information can be found at
www.adtran.com/warranty.
USA and Canadian customers can also receive a copy
of the warranty via ADTRAN’s toll free faxback
server, 877-457-5007.
Carrier Networks Warranty - Document 414.
Enterprise Networks Warranty - Document 901.
Contact Customer and Product Service (CAPS) prior
to returning equipment to ADTRAN.
For service, CAPS requests, or further information,
contact one of the following numbers:
ADTRAN Sales
Pricing/Availability
[phone]
ADTRAN Technical Support
Pre-sales Applications/Post-sales Technical
Assistance
[phone]
Standard hours: Monday-Friday, 7 a.m. - 7 p.m. CST
Emergency hours: 7 days/week, 24 hours/day
ADTRAN Repair/CAPS
Return for Repair/Upgrade
[phone]
Repair and Return Address
ADTRAN, Inc.
CAPS Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
Loop Interface:
Modulation Type .........................................................16 TC PAM
Mode............................................................................Full duplex, partially overlapped echo canceling
Number of Pairs ..........................................................One
Bit Rate........................................................................1.552 kbps
Baud Rate ....................................................................517.333K baud
Service Range..............................................................Defined by Carrier Service Area guidelines (first segment only)
Bridged Taps ...............................................................Single taps < 2 kft, total taps < 2.5 kft
Performance ................................................................Compliant with ANSI T1.418-2002 (HDSL Standard, Issue 2)
Return Loss .................................................................12 dB (50 kHz to 200 kHz)
1st Link Transmit Power (Data) Level............ ............16.6 ±0.5 dBm (0 to 450 kHz)
1st Link Transmit Power (Activation) Level...............16.3 ±0.5 dBm (0 to 450 kHz)
2nd Link Transmit Power (Data) Level............ ...........15.1 ±0.5 dBm (0 to 250 kHz)
2nd Link Transmit Power (Activation) Level... ...........14.8 ±0.5 dBm (0 to 250 kHz)
Input Impedance ..........................................................135 Ω
Power:
Input Power .................................................................Span-powered by H2TU-C: 5.2 watts, maximum
Tests:
Diagnostics ..................................................................Loopback initiated with HDSL in-band codes or from HTU-C or
HTU-R craft interface.
Physical:
Dimensions..................................................................0.719 in. W, x 2.625 in. H, x 6.5 in. L
Weight .........................................................................< 1 lb.
Environment:
Temperature ................................................................Operating (Standard): -40°C to +70°C; Storage:
-40°C to +85°C
Relative Humidity .......................................................Up to 95 percent, noncondensing
Part Number ................................................................1221045L2
Table 6. ADTRAN 239 H2R Specifications

861221045L2-5A

61221045L2-5A A-1
HDSL MAINTENANCE MODES
This Appendix describes operation of the HDSL2
system with regard to detection of in-band and ESF
facility data link loopback codes.
Upon deactivation of a loopback, the HDSL2 system
will synchronize automatically. Note that the
synchronization process of the HDSL system upon
deactivation of the H2R loopback could take up to 15
seconds, ensuring all system elements are
synchronized.
Loopback Process Description
In general, the loopback process for the HDSL2
system elements is modeled on the corresponding
DS1 system process. Specifically, the H2TU-C
loopback is similar to an Intelligent Office Repeater
loopback, and the H2TU-R loopbacks are similar to
an inline T1 Repeater loopback.
Appendix A
HDSL2 Loopbacks
The unit can detect the loopback activation or
deactivation code sequence only if an error rate of
1E-03 or better is present.
Loopback Control Codes
A summary of control sequences is given in Table
A-1.
NOTE
In all control code sequences presented, the
in-band codes are shown left-most bit transmitted
first, and the ESF data link codes with right-most
bit transmitted first.

A-2 61221045L2-5A
Table A-1. In-Band Addressable Loopback Codes
Note: All codes listed above must be sent for a minimum of 5 seconds in order for them to be detected and acted upon.
* If NIU is enabled, then the H2TU-R can be in network loopback when the H2TU-C or H2R loop up codes are sent.
1 Units must be armed with 11000b or FF48h before this code will work.
2 In order to behave like an NIU, the H2TU-R will not loop down from the network side with 9393h.
3 This code will be detected only if the units are armed AND there are NO loopbacks active.
Function / Code
Response
Arm/ 11000 (also known as a 2-in-5 pattern)
The HTU-R will loop up toward the network. No AIS or errors will be sent as a result of this loopback. The H2TU-C and H2R will arm.
When sent from the customer, this code will arm all units.
Arm/ FF48 (1111 1111 0100 1000)
ESF facility datalink: ESF only; when sent from the network, all units will be armed and an H2TU-R network loopback will be activated.
This code has no functionality when sent from the customer.
Disarm/ 11100 (also known as a 3-in-5 pattern)
All units are removed from the armed state. If any of the units are in loopback when the 11100 pattern is received, they will loop down. The
BK EDs will turn off on all units.
Disarm/ FF24 (1111 1111 0010 0100)
ESF facility datalink; disarms and/or loops down all units.
H2TU-C Network Loop Up / D3D3 (1101 0011 1101 0011) 1
If the units have been armed and no units are in loopback*, the HTU-C will loop up toward the network, 2 seconds of AIS (all 1s) will be sent,
5 seconds of data will pass, and then 231 bit errors will be injected into the DSX-1 signal. As long as the pattern continues to be sent, 231
errors will be injected every 20 seconds. When the pattern is removed, the unit will remain in loopback. If the pattern is reinstated, the
injection of 231 bit errors will resume at 20-second intervals.
H2R Network Loop Up / C741 (1100 0111 0100 0001) 1
If an H2R is present, the units have been armed, the H2R will loop up toward the network, 2 seconds of AIS (all 1s) will be sent, 5 seconds of
data will pass, and then 10 bit errors will be injected into the DSX-1 signal. As long as the pattern continues to be sent, 10 errors will be
injected every 20 seconds. When the pattern is removed, the unit will remain in loopback. If the pattern is reinstated, the injection of 10 bit
errors will resume at 20-second intervals.
H2TU-R Address 20 for extended demarc / C754 (1100 0111 0101 0100)
When sent from the network, an H2TU-R network loopback is activated and a 200-bit error confirmation is sent. 2 seconds of AIS (all 1s) will be
sent, 5 seconds of data will pass, and then 200 bit errors will be injected into the DSX-1 signal. As long as the pattern continues to be sent, 200
errors will be injected every 20 seconds. The HDS 2 office unit will not block transmission of far end NIU loopback from the customer premise
(H2TU-R).
Loop Down / 9393 (1001 0011 1001 0011) 2
All units currently in loopback will loop down, but remain in the armed state.
Query Loopback / D5D5 (1101 0101 1101 0101) 1
If the units are armed and the H2TU-C, H2R, or H2TU-R are in network loopback, errors are injected into the DSX-1 signal upon detection of
the query loopback pattern. As long as the pattern continues to be sent, errors are injected again every 20 seconds. The number of errors
injected each time depends on which unit is in loopback. 231 errors are injected if the H2TU-C is in network loopback, 20 at a time if the
H2TU-R is in network loopback, 10 at a time if H2R #1 is in network loopback, and 200 at a time if H2R #2 is in network loopback.
Query oop Parameters/ DBDB (1101 1011 1101 1011)1
If the units are armed and the H2TU-C is in network loopback, errors are injected into the DSX-1 signal upon detection of the query loop parameters
pattern. As long as a pattern continues to be sent, errors are injected again every 20 seconds. The number of errors injected each time depends on the
current status of signal quality and pulse attenuation parameters on each loop. 111 errors are injected if all HDSL2 receiver points (H2TU-C, H2R
NET, H2R CST, and H2TU-R indicate pulse attenuation is 30 or lower and signal quality (margin) is 6 or higher. 11 errors at a time are injected if
any of the 12 receiver points indicate pulse attenuation is greater than 30 and/or signal quality (margin) is less than 6.
Loopback Time Out Override / D5D6 (1101 0101 1101 0110) 1,3
If the units are armed and this pattern is sent, the loopback time out will be disabled. The time out option will be updated on the PROVISIONING
menu of the HTU (viewable through the RS-232 port) to NONE. As long as the units remain armed, the time out will remain disabled. When the
units are disarmed, the loopback time out will return to the value it had before the D5D6 code was sent.
Span Power Disable / 6767 (0110 0111 0110 0111) 1,3
If the units are armed and this pattern is sent, the H2TU-C will deactivate its span power supply, turning off the H2TU-R and H2R (if present).
As long as the pattern continues to be sent, the span power supply will remain disabled. When the pattern is no longer being sent, the H2TU-
C will reactivate its span power supply, turning the remote unit(s) on. All units will retrain and return to the disarmed and unlooped state.