Aeroflex ATC-600A-2 User manual

MAINTENANCE MANUAL
ATC-600A-2
APPENDIX D
Page 1
Nov 1/05
APPENDIX D - CONTROLS, CONNECTORS AND INDICATORS
0 10 20 30
600 20 40 80 100%
.10 1.5 2 4 6
WATTS x 100
158 10
ATC-600A
00807011
XMTR FREQ
-1
GAIN
FRAMING
-.5
+1
-1
PWR
ENCODER
0dB
-9dB
INTERR
BAT
LAMP
-.4
SYS
T
S
E
T
NO
+.4
0
-.2
0
INVALID
ALT
F2
0-300
XPDR RPLY DME PRF
0-30
+.5 A/C ALT DME
18 X
XPDR
SIG 17 Y
69
66
73
77
17 X
OFF
SQTR
W
OUT
LO
S
O
L
SLEW
IN
TREPLY
F
S
A
OUT
50%
IDENT
A/C CODE
B
B
B
+.2 3
A
2
A
IDENT
1
A
3
2
3
2
C
C
A
3
D
2
D
11 C1
D
FREQ
150
50
75
RANGE
HI
100
200
300
VELOCITY
1200
IN
1600
2400
800
600
400
-3
-4
-2
POWER
ANTENNA
+1
+3
+2
0
BAT
12
13
14
21 20 19 18 17 16 15222324252627
28
29
30
31
7 8 109 11654321
Front Panel
Figure 1
1.0A @ 110VAC
0.5A @ 220VAC
F2
TYPE F
F1
DIODE
SWITCH
DET SYNC
00807010
115
230
S
32 33 34
35
3637
Rear Panel
Figure 2
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MAINTENANCE MANUAL
ATC-600A-2
APPENDIX D
Page 2
Nov 1/05
CONTROLS, CONNECTORS AND INDICATORS
IN NUMERIC ORDER
CONTROLS, CONNECTORS AND INDICATORS
IN ALPHABETICAL ORDER
XPDR % RPLY/DME PRF Meter 1
NO ALT Indicator 2
INVALID ALT Indicator 3
DME PRF Switch 4
F2PULSE SPACING Indicator 5
IDENT PULSE Indicator (SPI) 6
OCTAL READOUT Indicators 7
NUMERICAL Readout 8
FREQ/PWR Switch 9
DME RANGE/VELOCITY Switch 10
FREQ/PWR Meter 11
XMTR FREQ Control 12
FREQ GAIN Control 13
RF INPUT/OUTPUT Connector 14
IDENT/50% RPLY Switch 15
VELOCITY IN/OUT Switch 16
FAST SLEW Switch 17
VELOCITY HI/LO RANGE Switch 18
SLOW SLEW Switch 19
SQUITTER ON/OFF Switch 20
MODE Switch 21
DME CHANNEL Switch 22
XPDR SIGNAL LEVEL Control 23
0/OFF/-9 dB SLS Switch 24
FRAMING PULSE SPACING Control 25
ALTITUDE ENCODER INPUT Connector 26
INTERROGATION SPACING Control 27
PWR/BAT Switch 28
PWR Indicator 29
BAT TEST Switch 30
SYS/LAMP TEST Switch 31
DIODE SWITCH INPUT Connector 32
DETECTED RF VIDEO OUTPUT Connector 33
SYNC OUTPUT Connector 34
FUSES 35
VOLTAGE SELECT Switch 36
AC POWER Connector 37
0/OFF/-9 dB SLS Switch 24
AC POWER Connector 37
ALTITUDE ENCODER INPUT Connector 26
BAT TEST Switch 30
OCTAL READOUT Indicators 7
DETECTED RF VIDEO OUTPUT Connector 33
DIODE SWITCH INPUT Connector 32
DME CHANNEL Switch 22
DME PRF Switch 4
DME RANGE/VELOCITY Switch 10
F2PULSE SPACING Indicator 5
FAST SLEW Switch 17
FRAMING PULSE SPACING Control 25
FREQ GAIN Control 13
FREQ/PWR Meter 11
FREQ/PWR Switch 9
FUSES 35
IDENT/50% RPLY Switch 15
IDENT PULSE Indicator (SPI) 6
INTERROGATION SPACING Control 27
INVALID ALT Indicator 3
MODE Switch 21
NO ALT Indicator 2
NUMERICAL Readout 8
PWR/BAT Switch 28
PWR Indicator 29
RF INPUT/OUTPUT Connector 14
SLOW SLEW Switch 19
SQUITTER ON/OFF Switch 20
SYNC OUTPUT Connector 34
SYS/LAMP TEST Switch 31
VELOCITY HI/LO RANGE Switch 18
VELOCITY IN/OUT Switch 16
VOLTAGE SELECT Switch 36
XMTR FREQ Control 12
XPDR % RPLY/DME PRF Meter 1
XPDR SIGNAL LEVEL Control 23
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MAINTENANCE MANUAL
ATC-600A-2
APPENDIX D
Page 3
Nov 1/05
1. Front Panel
Refer to Appendix D, Figure 1.
ITEM DESCRIPTION
1. XPDR % RPLY/DME PRF Meter
In Transponder Modes (A/C ALT, A/C CODE and Asettings of MODE Switch), indicates
the percent reply of the Transponder (in the operation mode selected).
In DME Mode (DME setting of MODE Switch), indicates the Pulse Repetition Frequency
(PRF) of the DME under test.
2. NO ALT Indicator
When lit, indicates No Altitude pulses are present between F1 and F2 of the
Transponder’s altitude reply.
3. INVALID ALT Indicator
When lit, indicates a received altitude code has an unassigned combination of codes.
The conditions to VALID Altitude information are the presence of at least one of the
C Pulses (C1, C2 or C4) and never C1 and C4 ON at the same time.
4. DME PRF Switch
Selects the full scale range (in PRF) of the XPDR % RPLY/DME PRF Meter:
O0-30 is used for track rates.
O0-300 is used for search rates.
NOTE: The interrogation Pulse Repetition Frequency (PRF) is fixed at 235 pps. (Only
in Transponder Mode.)
5. F2 PULSE SPACING Indicator
When lit, the FRAMING PULSE SPACING Control is positioned to a time when no part of
the F2 pulse is present. If the FRAMING PULSE SPACING Control is at or near zero,
and the F2 PULSE SPACING Indicator is lit, the 2nd framing pulse in the Transponder
reply is improperly spaced, is too narrow for normal operation or is absent altogether.
NOTE: If F2 is out of position, all other reply pulses between F1 and F2 may be skewed
out of position.
6. IDENT PULSE Indicator
When lit, indicates the Ident Pulse (SPI) is present in the reply.
When the Test Set is in A/C ALT Mode, the Ident Pulse is paired with the D4 pulse.
NOTE: Active in Transponder Modes only.
7. NUMERICAL Readout
Displays pilot’s code (as set into the Control Head) when the MODE Switch is set to A/C
CODE.
Displays altitude from -1.0 thousand to +126.7 thousand feet when the MODE Switch
is set to A/C ALT.
Displays altitude of Encoding Altimeter when an Encoding Altimeter is connected to
the ALTITUDE ENCODER INPUT Connector.
Displays range in nautical miles when the MODE Switch is set to DME.
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MAINTENANCE MANUAL
ATC-600A-2
APPENDIX D
Page 4
Nov 1/05
ITEM DESCRIPTION
8. OCTAL READOUT Indicators
Indicates which pulses are activating the NUMERICAL Readout when the MODE Switch is
set to A/C ALT.
NOTE: The altitude code is a Gray Daytex code.
Indicates pilot’s code (set in the Transponder Control Head) in binary form when MODE
Switch is set to A/C CODE or A.
NOTE: Active in Transponder Modes only.
9. DME RANGE/VELOCITY Switch
RANGE yields fixed range replies. (Starting range is set with the FAST SLEW Switch
and/or SLOW SLEW Switch.)
VELOCITY is divided into two crystal-controlled steps (50/75, 100/150, etc.). (The
VELOCITY HI/LO RANGE Switch determines which of the two values to be selected in
VELOCITY mode.) (Starting range is set with the FAST SLEW Switch and/or SLOW
SLEW Switch.)
NOTE: The FAST SLEW Switch and SLOW SLEW Switch operate in VELOCITY Mode in
acutal system range increments of approximately 0.025 NM. However, the
velocity range is displayed on the NUMERICAL Readout in 0.1 NM steps only.
10. FREQ/PWR Switch
OFREQ switches FREQ/PWR Meter to display frequency deviation.
OPWR switches FREQ/PWR Meter to display peak power.
11. FREQ/PWR Meter
When the FREQ/PWR Switch is set to PWR, FREQ/PWR Meter displays peak power from
0 to 1.5 kW (if test antenna spacing from the aircraft is correct or a 34 dB pad and
coaxial cable are used).
NOTE: The 34 dB pad and coaxial cable are not supplied with the unit.
When the FREQ/PWR Switch is set to FREQ, FREQ/PWR Meter displays frequency
deviation of the UUT from desired frequency.
12. XMTR FREQ Control
Used to tune the FREQ/PWR Meter needle for maximum deflection.
In Transponder operation, frequency deviation (from 1090 MHz) of the UUT is read
directly from the XMTR FREQ Control in MHz.
In DME operation, frequency deviation (from 1041 MHz) of the UUT is read directly from
the XMTR FREQ Control in MHz.
NOTE: The Plus (+) and minus (-) signs on the XMTR FREQ Control are reversed in
DME operation (positive values are left of zero and negative values are right
of zero).
13. FREQ GAIN Control
Regulates amount of current to the FREQ/PWR Meter to enable all signals (weak and
powerful) to display equally.
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MAINTENANCE MANUAL
ATC-600A-2
APPENDIX D
Page 5
Nov 1/05
ITEM DESCRIPTION
14. RF INPUT/OUTPUT Connector
Used to connect up a remote test antenna (ramp operation) or a 34 dB pad and coaxial
cable (bench operation).
NOTE: The 34 dB pad and coaxial cable are not supplied with the unit.
15. IDENT/50% RPLY Switch
OIDENT sends a 1350 Hz tone to the DME.
O50% RPLY deletes 50% of the replies to a DME on a 50-50 basis.
16. VELOCITY IN/OUT Switch
Selects the direction of the replied range in VELOCITY Mode:
OIN - towards the ground station.
OOUT - away from the ground station.
NOTE: When the inbound range reaches 0.0 NM, the range instantly changes to
399.0 NM and continues inbound. When the outbound range reaches 399.0 NM,
the range instantly changes to 0.0 NM and continues outbound.
17. FAST SLEW Switch
Sets DME replied distance or range approximately 10 times faster than the SLOW SLEW
Switch. Range is slewed from 0.0 to 399.0 NM in approximately 10.0 NM steps (inbound
or outbound).
18. VELOCITY HI/LO RANGE Switch
Determines which of the two crystal-controlled increments (50/75, 100/150, etc.)
selected by the DME RANGE/VELOCITY Switch to implement:
OHI selects the greater of the two values.
OLO selects the lesser of the two values.
19. SLOW SLEW Switch
Sets DME replied distance or range approximately 10 times slower than the SLOW SLEW
Switch. Range is slewed from 0.0 to 399.0 NM in 1.0 NM steps (inbound or outbound).
20. SQUITTER ON/OFF Switch
OSQTR turns squitter ON in DME Operation.
OOFF turns squitter OFF in DME Operation.
NOTE: Squitter is fixed to an average of 2700 PRF at a random rate.
21. MODE Switch
Determines which Transponder Mode (AC ALT, A/C CODE or A) or DME Mode is active.
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MAINTENANCE MANUAL
ATC-600A-2
APPENDIX D
Page 6
Nov 1/05
ITEM DESCRIPTION
22. DME CHANNEL Switch
Selects one of three DME channels (17X, 17Y or 18X).
Refer to Appendix D, Table 1 for appropriate reply frequency and pulse spacing.
CHANNEL VOR-PAIRED FREQUENCY
17X 108.00 MHz
18X 108.10 MHz
17Y 108.05 MHz
GROUND TO AIR
CHANNEL FREQUENCY SPACING
17X 978 MHz 12 µs
18X 979 MHz 12 µs
17Y 1104 MHz 30 µs
AIR TO GROUND
CHANNEL FREQUENCY SPACING
17X 1041 MHz 12 µs
18X 1042 MHz 12 µs
17Y 1041 MHz 36 µs
DME Frequency/Spacing Assignments
Table 1
23. XPDR SIGNAL LEVEL Control
Varies the Transponder output signal level at the receiver antenna from -66 to
-79 dBm (±1.5 dBm). (Valid with the remote test antenna or 34 dB pad and coaxial
cable.)
NOTE: The 34 dB pad and coaxial cable are not supplied with the unit.
24. 0/OFF/-9 dB SLS Switch
OOFF - P1 and P3 of the Transponder interrogation are transmitted.
O0dB - P2 is added at the same level as P1.
O-9dB - P2 is added at -9 dB amplitude, relative to P1.
25. FRAMING PULSE SPACING Control
Used to calculate the position and width of the the F2 pulse by rotating cw or ccw until
the F2 PULSE SPACING Indicator is lit (indicating the exact leading and trailing edges of
the F2 pulse).
NOTE: The approximate width of the F2 pulse equals the difference between the lowest
and highest FRAMING PULSE SPACING Control settings at which the F2 PULSE
SPACING Indicator is lit.
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MAINTENANCE MANUAL
ATC-600A-2
APPENDIX D
Page 7
Nov 1/05
ITEM DESCRIPTION
26. ALTITUDE ENCODER INPUT Connector
Used for direct connection of altimeter output for encoding altimeter testing. (MODE
Switch must be set to A/C ALT for altimeter testing and input pulse must be per ARINC
532D [Appendix D, Figure 3].)
NOTE: ALTITUDE ENCODER INPUT Connector Pin-Out is shown in Appendix A.
27. INTERROGATION SPACING Control
Used to adjust the interrogation spacing from P1 to P2 and P3 in Transponder
operation.
P1 and P3 interrogation spacing is set at 8 and 21 µs. P2 interrogation spacing is 2 µs.
The INTERROGATION SPACING Control moves P2 and P3 ±1.0 µs relative to P1. P2
and P3 spacing remains constant. (Refer to Appendix D, Figure 3)
28. PWR/BAT Switch
Two position switch controls power to the Test Set:
OPWR connects Test Set to ac line power connected to AC IN Connector.
OBAT connects or disconnects Test Set from internal Battery. Connecting the Test
Set to the Battery activates an internal battery timer. Test Set operation disconnects
from the internal Battery after reaching the internal battery timer limit (approximately
6 to 10 minutes) or by pressing the PWR/BAT Switch to BAT to disconnect.
29. PWR Indicator
Is lit when applying ac or battery power to the Test Set.
30. BAT TEST Switch
When pressed, indicates battery voltage on XPDR % RPLY/DME PRF Meter. (Left edge
of white band indicates 12.1 V.)
31. SYS/LAMP TEST Switch
OLAMP - all OCTAL READOUT Indicators are lit.
OSYS - F2 PULSE SPACING Indicator and the BINARY READOUT Indicators (C4 and
D2) are lit; internal circuits are checked in Transponder Modes:
OAC ALT - NUMERICAL Readout displays 126.7 thousand feet.
OA/C CODE - NUMERICAL Readout displays 0042.
NOTE: Center position is OFF.
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MAINTENANCE MANUAL
ATC-600A-2
APPENDIX D
Page 8
Nov 1/05
2. Rear Panel
Refer to Appendix D, Figure 2.
ITEM DESCRIPTION
32. DIODE SWITCH INPUT Connector
Used with an high impedance probe to monitor all modulator pulses sent to the internal
diode switch.
33. DETECTED RF VIDEO OUTPUT Connector
Used with an high impedance probe to monitor detected RF Video from the UUT.
34. SYNC OUTPUT Connector
Used with an high impedance probe to monitor the positive going TTL level pulse
(present during Transponder operation).
NOTE: Pulse should be coincident with the leading edge of P1 of the Transponder
interrogation.
Used, with a coaxial cable connected to an external Oscilloscope Sync/Trigger
Connector, for viewing XPDR Interrogation and/or Reply Pulses.
NOTE: The coaxial cable is not supplied with the unit.
35. FUSES
Fuses input power to the Test Set. Refer to 1-2-1, Table 1 in ATC-600A-2 Operation
Manual for correct fuse size and type.
36. VOLTAGE SELECT Switch
Selects 115 or 230 VAC to match input ac power.
37. AC POWER Connector
Provides input for external ac power. Refer to Appendix C for Power Requirements.
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MAINTENANCE MANUAL
ATC-600A-2
APPENDIX D
Page 9
Nov 1/05
F1C1A1C22
A4
C4
AXB
1D1B22
D4
B4
D2
FSP
1
TRANSPONDER REPLY PULSE ASSIGNMENT
ALTITUDE TRANSMISSION CODE
2000
2500
500
1000
1500
-500
0
-1000
6500
6000
5500
5000
4500
3500
3000
4000
12500
12000
11500
10000
11000
10500
9500
9000
8000
8500
7500
7000
17000
16000
15500
15000
14500
14000
13500
13000
18000
19000
ALTITUDE IN FEET
A A A
1 2 4
B B4
2 1
B
2
C
4
C C1
500 FOOT GRAY CODE
FROM ABOVE
100 FOOT INCREMENT
ALTITUDE IN THOUSANDS OF FEET
100 FOOT INCREMENT TABLE
100 FOOT
PULSES
SUM OF DIGITS OF
GRAY CODE
C12
C4
CODD EVEN
0 0 0 1 1
0 1 1 1 0
1 1 0 0 0
7 6 5 4 3
8 9 0 1 2
REPLY PULSE ASSIGNMENT
500 CODE INCREMENT
GRAY CODE
FOR 100 FOOT INCREMENT
SEE BELOW
1 1
C B B2
4
D2 A B A4
2
A D
1 4 4
C C2
*0 OR 1 IN A PULSE POSITION INDICATES THE
ABSENCE FOR PRESENCE OF A PULSE RESPECTIVELY.
0000 0001 0011 0010 0110 0111 0101 0100 1100 1101 1111 1110 1010 1011 1001 1000
0
31 32 63 64 95 96
127 128 159 160 191 192 223 224 255
1
30 33 62 65 94 97
126 129 158 161 190 193 222 225 254
2
29 34 61 66 93 98
125 130 157 162 189 194 221 226 253
3
28 35 60 67 92 99
124 131 156 163 188 195 220 227 252
4
27 36 59 68 91
100 123 132 155 164 187 196 119 228 251
5
26 37 58 69 90
101 122 133 154 165 186 197 218 229 250
6
25 38 57 70 89
102 121 134 153 166 185 198 217 230 249
7
24
39 56 71 88
103 120 135 152 167 184 199 216 231 248
8
23 40 55 72 87
104 119 136 151 168 183 200 215 232 247
9
22 41 54 73 86
105 118 137 150 169 182 201 214 233
246
10 21 42 53 74 85
106 117 138 149 170 181 202 213 234 245
11 20 43 52 75 84
107 116 139 148 171 180 203 212 235 244
12 19 44 51 76 83
108 115 140 147 172 179 204 211 236 243
13 18 45 50 77 82
109 114 141 146 173 178 205 210 237 242
14 17 46 49 78 81
110 113 142 145 174 177 206 209 238 241
15 16 47 48 79 80
111 112 143 144 175 176 207 208 239 240
0000 0001 0011 0010 0110 0111 0101 0100 1100 1101 1111 1110 1010 1011 1001 1000
UNIT DISTANCE REFLECTED DINARY CODE FOR 8 BITS
256 INCREMENTS (500 FOOT EACH) GIVING ALTITUDE FROM -1000 FEET TO 127,000 FEET.
D ,D ,A ,A PULSES
A ,B ,B ,B PULSES *
4124
2412
-1
0
4
9
14
19
24
29
34
39
44
49
54
59
64
69
94
89
84
79
74
99
104
109
114
119
124
00807006
ALTITUDE CODE FOR MODE C REPORTING
CODE
Altitude Pulse Position Assignment Chart (ARINC 532D)
Figure 3
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MAINTENANCE MANUAL
ATC-600A-2
APPENDIX D
Page 10
Nov 1/05
THIS PAGE INTENTIONALLY LEFT BLANK.
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