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CLC-DRCS-PCASM Datasheet(PDF) 11 Page - Texas Instruments |
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CLC-DRCS-PCASM Datasheet(HTML) 11 Page - Texas Instruments |
11 / 24 page Rev. 3.01 June 4, 1999 10 ©1999 National Semiconductor Corporation For either selection, a loop time constant of 1.5µs results when $*&B/223B*$,1 and F CK=52MHz. Each increase of $*&B/223B*$,1 by 1 will decrease by a factor of 2. Halving FCK will increase by a factor of 2. Table 6 gives the configuration register values for each of the AGC modes associated with switch position 7 as men- tioned in Table 4. Any of these default configurations can be modified by using the DRCS Control Panel software. See the DRCS Control Panel Software section on page 7. Initial Operation This procedure will verify proper operation of the DRCS Board and Data Capture Board It is assumed that the you will be conducting this test in conjunction with the Data Capture Board. If not, you will have to solve the problem of data capture. Refer to the CLC5902 data sheet to understand its data capture require- ments. The sequence below requires an unmodulated source such as an HP8643 or the HP8644. 1. If you have not already done so, install the DRCS Control Panel and Data Capture Board software. 2. Connect +5V to VCC and ground to GND of con- nector J3 on the Data Capture Board. When the boards are connected together in the next step, these connections will power both boards. Note that VEE is not required because neither board needs a nega- tive power supply. 3. Connect J1 of the DRCS Board to J1 of the Data Capture Board. 4. Connect a serial cable from the PC to J9 on the DRCS Board. 5. If two serial ports are available on the PC, connect the other to J9 of the Data Capture Board. If not, the single port will have to be shared. 6. Make sure that all DIP switches on both boards are set to off. 7. Turn on the power supply. 8. Start the DRCS Control Panel and Data Capture Board software. 9. Configure the COM ports for the DRCS Control Panel and Data Capture Board software. The COM Decimal Values (Hex) Decimal Register Address (Hex) -12dB/-12dB -15dB/-15dB 128 (0x80) -88 (0xA8) -82 (0xAE) 129 (0x81) -88 (0xA8) -82 (0xAE) 130 (0x82) -75 (0xB5) -68 (0xBC) 131 (0x83) -66 (0xBE) -60 (0xC4) 132 (0x84) -61 (0xC3) -54 (0xCA) 133 (0x85) -56 (0xC8) -49 (0xCF) 134 (0x86) -53 (0xCB) -46 (0xD2) 135 (0x87) -50 (0xCE) -43 (0xD5) 136 (0x88) -47 (0xD1) -40 (0xD8) 137 (0x89) -42 (0xD6) -36 (0xDC) 138 (0x8A) -39 (0xD9) -32 (0xE0) 139 (0x8B) -36 (0xDC) -29 (0xE3) 140 (0x8C) -33 (0xDF) -26 (0xE6) 141 (0x8D) -29 (0xE3) -22 (0xEA) 142 (0x8E) -25 (0xE7) -18 (0xEE) 143 (0x8F) -22 (0xEA) 0 (0x00) 144 (0x90) -19 (0xED) 0 (0x00) 145 (0x91) -15 (0xF1) 0 (0x00) 146 (0x92) 0 (0x00) 0 (0x00) 147 (0x93) 0 (0x00) 0 (0x00) 148 (0x94) 0 (0x00) 0 (0x00) 149 (0x95) 0 (0x00) 0 (0x00) 150 (0x96) 0 (0x00) 0 (0x00) 151 (0x97) 0 (0x00) 0 (0x00) 152 (0x98) 0 (0x00) 0 (0x00) 153 (0x99) 0 (0x00) 20 (0x14) 154 (0x9A) 17 (0x11) 23 (0x17) 155 (0x9B) 20 (0x14) 26 (0x1A) 156 (0x9C) 22 (0x16) 29 (0x1D) 157 (0x9D) 27 (0x1B) 34 (0x22) 158 (0x9E) 30 (0x1E) 37 (0x25) 159 (0x9F) 34 (0x22) 40 (0x28) Table 5 AGC lookup table values for the two AGC dynamics options. τ τ τ SW2 Switch Position 7 Settings Register Name 0 1 $*&B+2/'B,& 00 $*&B5(6(7B(1 00 $*&B)25&( 10 (;3B,1+ 00 $*&B&2817 2815 2815 $*&B,&B$% 32 32 Table 6 Register values corresponding to SW2 switch position 7. |
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