Modulation Plugin - Revision history

59.148.253.117: /* SVN Server */

2012-04-26T06:35:37Z

SVN Server

2009-08-25T02:31:36Z

pcb upgrade to v2.02.00

2009-02-24T01:55:04Z

topic sentence

2009-01-21T02:50:54Z

Test procedure

2009-01-08T07:58:37Z

add view vc link

2008-12-16T07:00:57Z

Frequency Response for 4ch

2008-12-10T07:11:05Z

frequency error rate

2008-12-08T09:50:05Z

accuracy requirement

2008-12-08T09:30:10Z

Update

2008-11-25T03:27:14Z

Hardware Solution: adding a svn server

@@ Line 152: / Line 152: @@
 ===[http://chungyan5.no-ip.org/vc/?root=modulation_plugin SVN Server]===
 *Contains circuit PCB and software
 ====Version 1.00.01====
@@ Line 160: / Line 159: @@
 *dac + analog switch + op-amp introduce bouncing noise spikes when switching.
 *New board provides trigger signal to external circuitry only.
 ===Testing Procedure===

@@ Line 17: / Line 17: @@
 **Variable amplitude (0V - 2.5V)
 **Accuracy frequency response (error < 2%)
-*interface to MCU which do the control
+*Interface to MCU which do the control
@@ Line 32: / Line 32: @@
 ==Hardware Solution==
@@ Line 146: / Line 95: @@
 o 11 64 0 34 2.5 3.90625E-4 2 -1
 </nowiki></pre>
 ===[http://chungyan5.no-ip.org/vc/?root=modulation_plugin SVN Server]===
 *Repository: svn+ssh://chungyan5.no-ip.org/home/open_data/electronic_computer/modulation_plugin/svn_rep
-*Contains circuit PCB and software for dsPic Programmable Clock
+*Contains circuit PCB and software
 ===Testing Procedure===
 *For each channel (ch 1 - 4) at pin H2.1, H2.3, H2.5, H2.7
 **Use a CRO to watch the signal
@@ Line 159: / Line 170: @@
 ***Adjust the voltage from 0 - 2.5V (measure accuracy).
 ***Adjust the frequency from DC - 200kHz (measure accuracy). If frequency is not accurate, check crystal circuitry.
 [[category:projects]]

@@ Line 1: / Line 1: @@
 ==ToDo==
 *Voltage during "Lo" time of DAC can also be set (i.e. not necessary zero)
@@ Line 157: / Line 159: @@
 ***Adjust the voltage from 0 - 2.5V (measure accuracy).
 ***Adjust the frequency from DC - 200kHz (measure accuracy). If frequency is not accurate, check crystal circuitry.

@@ Line 149: / Line 149: @@
 *Repository: svn+ssh://chungyan5.no-ip.org/home/open_data/electronic_computer/modulation_plugin/svn_rep
 *Contains circuit PCB and software for dsPic Programmable Clock
-*Also available on [http://chungyan5.no-ip.org/vc/?root=modulation_plugin ViewVC]

← Older revision		Revision as of 07:58, 8 January 2009
Line 149:		Line 149:
	*Repository: svn+ssh://chungyan5.no-ip.org/home/open_data/electronic_computer/modulation_plugin/svn_rep		*Repository: svn+ssh://chungyan5.no-ip.org/home/open_data/electronic_computer/modulation_plugin/svn_rep
	*Contains circuit PCB and software for dsPic Programmable Clock		*Contains circuit PCB and software for dsPic Programmable Clock
		+	*Also available on [http://chungyan5.no-ip.org/vc/?root=modulation_plugin ViewVC]

← Older revision		Revision as of 07:00, 16 December 2008
Line 51:		Line 51:
	***+/-0.000Hz@10Hz => 0.00%		***+/-0.000Hz@10Hz => 0.00%
	***+/-0.000Hz@5Hz => 0.00%		***+/-0.000Hz@5Hz => 0.00%
		+	*Accuracy of frequency: <2%
		+	**Conditions: external crystal, no OS context switch, 4 channel operation, Ch2 = 1kHz, Ch3 = 50kHz, Ch4 = 200kHz
		+	**Measurements of ch1 (by scope)
		+	***+/-2.000kHz@200kHz => 1.00%
		+	***+/-0.520kHz@100kHz => 0.52%
		+	***+/-0.130kHz@50kHz => 0.26%
		+	***+/-0.130kHz@10kHz => 0.06%
		+	***+/-0.002kHz@5kHz => 0.04%
		+	***+/-0.200Hz@1000Hz => 0.02%
		+	***+/-0.100Hz@500Hz => 0.02%
		+	***+/-0.000Hz@100Hz => 0.00%
		+	***+/-0.010Hz@50Hz => 0.01%
		+	***+/-0.000Hz@10Hz => 0.00%
		+	***+/-0.001Hz@5Hz => 0.02%

@@ Line 12: / Line 12: @@
 *The modulation module is used to deliver a digital output signal with the following characteristics:
 **Square wave
-**Variable frequency (0 - 10MHz)
+**Variable frequency (0 - >10kHz)
 **Variable amplitude (0V - 2.5V)
-**Accuracy frequency response (error < 1%)
+**Accuracy frequency response (error < 2%)
 *interface to MCU which do the control
@@ Line 34: / Line 34: @@
 *I2C Baudrate: 400kHz
 *Output Voltage Range: 0 - 3.3V
-*Output Frequency Range: 0 - 10MHz
+*Output Frequency Range: 0 - 200kHz
 *Number of channels: 4
-*Accuracy of frequency (external crystal)
+*Accuracy of frequency: <2%
-**+/-0.5Hz@1000Hz => 0.05%
+**Conditions: external crystal, no OS context switch, single channel operation
-**+/-0.001Hz@5Hz => 0.02%
+**Measurements (by scope)

← Older revision		Revision as of 03:27, 25 November 2008
Line 118:		Line 118:
	</nowiki></pre>		</nowiki></pre>

		+	===[http://chungyan5.no-ip.org/vc/?root=modulation_plugin SVN SERVER]===

	==Components Inside Circuit==		==Components Inside Circuit==