- 您现在的位置：买卖IC网 > PDF目录67672 > GP2000 (Mitel Networks Corporation) () PDF资料下载
参数资料
| 型号： | GP2000 |
| 厂商： | Mitel Networks Corporation |
| 英文描述： | () |
| 中文描述： | （） |
| 文件页数： | 25/25页 |
| 文件大小： | 256K |
| 代理商： | GP2000 |
9
GP2000 – GPS CHIPSET DESIGNER’S GUIDE
Carrier Cycle Counter
This block contains counters for determining the number
(whole and fractional) of in-phase carrier DCO cycles between
the last 2 TlCs.
CHx_CARRIER_CYCLE_COUNTER_HIGH and
CHx_CARRIER_CYCLE_COUNTER_LOW:
The block provides the number of positive going zero
crossings of the in-phase carrier DCO between the last 2 TlCs.
The counter is 20 bits long.
CHx_CARRIER_DCO_PHASE: gives the in-phase carrier
DCO fractional carrier phase sampled at the current TIC. The
counter is 10 bits long to give a resolution of 1/1024
(approximately 02 mm at L1 ) of a cycle.
The above registers are used to form the integrated carrier
phase measurements.
Accumulators
Four 16-bit accumulators contain the results of the code
correlation over the code period of nominally 1ms. This data
can be accessed through the following registers:
(i) CHx_I_TRACK: The accumulation from the in-phase Track arm.
(ii) CHx_Q_TRACK: The accumulation from the quadrature Track
arm.
(iii) CHx_I_PROMPT: The accumulation from the in-phase
Prompt arm.
(iv) CHx_Q_PROMPT: The accumulation from the quadrature
Prompt arm.
Fig. 10 GP2021 carrier DCO
Status Registers
There are 4 status registers, three associated with the accu-
mulators and one with the measurement data:
(i) ACCUM_STATUS_ A: Amongst other things, this
register contains a status bit for each channel which is
set when new accumulation data is available for that
channel.
(ii) ACCUM_STATUS_B: Amongst other things, this
register contains a status bit for each channel which is
set when new accumulation data becomes available
for that channel before the last accumulation result was
read. This gives an indication that the processor is not
accessing some or all of the accumulation registers at
a fast enough rate.
(iii) ACCUM_STATUS_C: This register contains a status
bit for each channel which is set or cleared according
to whether the Track arm of that channel is generating
Early or Late code when the arm is configured in Dither
mode.
(iv) MEAS_STATUS_A: Amongst other things, this register
contains a status bit for each channel which is set when
new measurement data becomes available for that
channel before the last measurement data was read.
This gives an indication that the processor is not
accessing some or all of the measurement data
registers at a fast enough rate.
1
2
1
1
2
1
1
2
相关PDF资料 |
PDF描述 |
|---|---|
| GP2010 | GPS Receiver RF Front End |
| GP2010 | GPS Receiver RF Front End(用于全球定位系统（GPS）接收器的第二代RF前端) |
| GP2015 | Aluminum Electrolytic Radial Leaded Low Profile Wide Temp Capacitor; Capacitance: 22uF; Voltage: 25V; Case Size: 5x9 mm; Packaging: Bulk |
| GP2015 | GPS Receiver RF Front End(用于全球定位系统（GPS）接收器的第二代RF前端) |
| GP2021 | GPS 12 channel Correlator(用于全球定位系统（GPS）接收器的12通道的C/A代码基带相关器) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| GP20-005R | 制造商:FRONTIER 制造商全称:Frontier Electronics. 功能描述:2A GENERAL PURPOSE PLASTIC RECTIFIER |
| GP2000-D11-L25-0.3 | 制造商:t-Global Technology 功能描述:THERMAL PAD TUBE 11X25X0.3MM |
| GP2000-D11-L30-0.3 | 制造商:t-Global Technology 功能描述:THERMAL PAD TUBE 11X30X0.3MM |
| GP2000-D13.5-L25-0.3 | 制造商:t-Global Technology 功能描述:THERMAL PAD TUBE 13.5X25X0.3MM |
| GP2000-D13.5-L30-0.3 | 功能描述:THERMAL PAD TUBE 13.5X30X0.3MM 制造商:t-global technology 系列:GP2000 零件状态:有效 使用:- 形状:圆形 外形:30.00mm x 13.50mm 厚度:0.012"（0.305mm） 材料:硅树脂橡胶 粘合剂:- 底布，载体:- 颜色:绿 热阻率:- 导热率:1.3 W/m-K 标准包装:1 |
发布紧急采购，3分钟左右您将得到回复。