1、INCH-POUND MIL-M-4 92 3 CA (CR) AMENDMENT 1 30 June 1992 MILITARY SPECIFICATION MULTIPLEXER-COMBINER, TD-1234 (P)/TTC This amendment forms part of MIL-M-49239A(CR), dated 30 October 1986, is approved for use by the Communication-Electronics Command, Department of the Army, and is available for use b
2、y all Departments and Agencies of the Department of Defense. PAGE 8 3.7.4.6: Delete and substitute: “3.7.4.6 Transmit Level - (See 4.7.4.6) For an input at either group of + 1 1/2 dBm, the output at the other group shall be +5 dBm jl/2dB measured into a 58 Ohm resistive load. For an input at the pas
3、sive interface of +21.3 dBm, the output at the appropriate group shall be -11.5dBm +1.5dB measured into a 600 ohm resistive load. PAGE 13 3.7.11: Delete “(See 4.7.11.i)1t and substitute “(See 4.7.11)*# PAGE 14 3.7.13.1: Delete and substitute: “3.7.13.1 Digital Channel Check - There shall be no error
4、s for a period of 30 seconds with the orderwires on.“ PAGE 23 Replace note identified by double asterisk (*) by the following: li* One time only first article test not to be performed during Group C production lot tecting.I1 PAGE 26 On Table II Group A Inspections: Change the following: Under Visual
5、-Mechanical requirements for the Analog Applique Unit and Group Modem, change the requirement paragraph from ii3.1411 to Ii3. 15“. For Group Modem change inspection paragraph from i14.14f1 to 114. 1311. AMSC No. N/A FSC 5820 Distribution Statement A. Approved for public release; Distribution is unli
6、mited. PAGE 1 of 4 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-4 92 3 9A AMENDMENT 1 On Table II Group A Inspections: Add the following: Under Visual-Mechanical requirem
7、ents add ii3.14vt in the paragraph column for each circuit card listed. PAGE 29 Subgroup 4, Dust inspection paragraph from ir5.8.4t1 to PAGE 32 4. On Table VI1 Special Test Equipments: Add the following: requirement . Under Timing Source Drawing Number column t1A305166v1 and under functional descrip
8、tion: outputs, switch selectable to positions between 72 and 4608 kb/s. Also, provided are four independent Station Clock/ Telemetry Clock outputs, switch selectable to 2, 16 or 32 HZ.I “The timing source provides four independent group PAGE 33 On Table VI11 Government Furnished Equipment: Under equ
9、ipment column “Remote Loop Group Multiplexer-TD-1233(P)/TTCf1 and under description column IlThe Remote Loop Group Multiplexer time division multiplexes/ demultiplexes up to 4 analog or conditioned diphase loops into/from a 4 1/2 channel group. is a conditioned diphase signal. Loop Modem CCAs or Ana
10、log Applique Unit CCAs in all channel slots.“ Add the following: The group input/output This equipment must be configured with PAGE 37 4.7.1.3b, j : line 1: Delete 11A108v and substitute 11A1511. 4.7.1.3. e: DeletelVL1 and substitute in the impedance formula. PAGE 39 4.7.2.1.d: line 2: Delete “300 H
11、z“ and substitute 300)cHzau. 4.7.2.1. c, f: Delete lfVLtt and substitute irVI1l in the impedance formula. PAGE 40 4.7.3.2: Delete paragraphs title “Input Impedance“ and substitute “Input Load Impedancell . PAGE 41 4.7.3.3.d: Delete 1/0 pin number ii231r and substitute ir211v. PAGE 2 of 4 Copyright C
12、ommunications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-492 39A AMENDMENT 1 O PAGE 4d1 4.7.4.6i: Delete “58 ohmst1 and substitux 11600 ohms11. PAGE 46 4.7.5.3. i: Delete “Zout=124 Vl/V2-1 ohms
13、f1 and substitute “Zout=125 (Vl/V2)-1 ohmsv1. PAGE 47 4.7.5.5.c: line 2: Delete “figure 28“ and substitute “figure 3l1I. PAGE 48 4.7.6. j: Delete 1i3.7.4t1 and substitute “3.7 .611. PAGE 50 4.7.7.8.1. a: Delete the word and substitute ftthell. PAGE 50 4.7.7.8.2: Delete Il4 Analog Channels11 and subs
14、titute 114 Analog Circuit Cardsm1. 4.7.7.8.2. c, h: line 3 : Delete 11+6 dBm“ and substitute “+6dB“. PAGE 51 4.7.7.9.c: line 2: Delete I1+1O dBm“ and substitute I1+1O dB“. PAGE 63 4.7.13.3: line 3: Delete 113.7.13.211 and substitute 113.7.13.311. PAGE 64 4.7.13.7 .c: line 2: Delete 1i3.7.13.511 and
15、substitute 113.7.13.71l. PAGE 66 4.8.3: Add the following after Altitude: “(See 3.8.3)11 PAGE 67 4.8.8.1: Delete and substitute: “4.8.8.1 Vibration - The equipment shall be subjected to test of MIL-STD-810C, Method 514.2, Procedure X (Curve AW), Part II, as specified below. Inspection. Perform a Uni
16、t Performance Electrical Test and Visual PAGE 3 Of 4 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-49239A (1) 58 = 9999906 1164114 859 MIL-M-4 9 2 3 9A AMENDMENT 1 Vibrati
17、on in each of the three (3) principal axes shall be performed in the following sequence. Install the unit equipment mounting brackets on the UUT and install the unit on the vibration exciter in the vertical axis (top to bottom). Install the control accelerometers on the vibration fixture. SINUSOILAJ
18、! VIBRATION PROFILE TEST LEVEL: 1.5g FREQUENCY RANGE: 5.0 Hz to 200 Hz to 5.0 Hz SWEEP RATE: 5.0 hZ TO 200 hZ TO 5.0 Hz in twelve (12) minutes. TIME DURATION: 84 Minutes per axis 1 Subject the unit to the vibration levels specified in the vibration profile from 5Hz to 200 Hz over a period of six (6)
19、 minutes, while monitoring the control accelerometer(s). Verify that the monitored response of the control accelerometer(s) is within 10 percent of the specified 1.5g input thru the entire frequency range of 5.0 Hz to 200 Hz. Cycle the unit in accordance with the vibration profile. the frequency at
20、the sinusoidal rate from 5.0 Hz to 200 Hz to 5.0 Hz within 12 minutes. (This constitutes one (1) cycle.) Subject the unit to 7 cycles of vibration for a total test time of 84 minutes. (This includes the 6 minutes recorded previously). Repeat Steps with the unit oriented in side-to-side and front-to-
21、back axes. Vary Perform a Unit Electrical Performance Test and Visual Inspection. PAGE 92 On Figure 17 Input and Output Impedance: Delete lIDIGITAL CHANNELS 9-16“ on UUT. PAGE 96 On Figure 21 Loop Power Feed Load:In the NOTE: Delete the value of R1 I111.2K i 1% 0.5WV1 and replace with 1t680+1% Ohms
22、5Wf1 and delete the value of R2 11680+1% Ohms 5Wt1 and replace with 1111.2k+l% Ohms 0.5W.I Custodian: Army - CR PAGE 4 of 4 PREPARING ACTIVITY Army - CR Project 5820-A946 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
